The road to Avengers: Doomsday is unlike any Marvel event that has come before. With heroes from multiple universes set to collide against Robert Downey Jr.'s Doctor Doom, the upcoming blockbuster promises to be one of the biggest crossover spectacles in comic book movie history. From the Avengers of Earth-616 to the Fantastic Four and the beloved Fox X-Men, the film is bringing together decades of Marvel storytelling under one roof.

That kind of payoff does not happen overnight. While Marvel Studios has designed the film to be enjoyable for newcomers, longtime fans know that the emotional moments, character reunions, and multiversal twists will hit much harder with the right preparation. For anyone planning the ultimate Marvel marathon before December 18, here's every movie and TV show worth watching before Avengers: Doomsday.

No Avengers: Doomsday watchlist feels complete without going back to the movie that changed superhero cinema forever. The Avengers was the first time Marvel Studios successfully united Iron Man, Captain America, Thor, Hulk, Black Widow and Hawkeye on the big screen, proving that an interconnected cinematic universe could actually work. More than a blockbuster, it established the friendships, rivalries, and teamwork that became the emotional backbone of every Avengers movie that followed.

Revisiting the 2012 classic also makes the journey of several returning heroes feel far more rewarding. Watching Thor's evolution from an arrogant prince into a seasoned warrior, Hulk's struggle with his identity, and Hawkeye's transformation from S.H.I.E.L.D. agent to family man adds greater emotional weight before they step into another universe-spanning battle. With Avengers: Doomsday bringing together heroes from multiple realities, the original team-up serves as the perfect reminder of where the MCU's biggest story truly began.

While Avengers: Age of Ultron often sits in the shadow of its predecessor and successors, its importance has only grown over the years. The film introduces Vision, expands Wanda Maximoff's role, and continues developing the complicated relationships between the Avengers. It also plants several narrative seeds that Marvel Studios has continued exploring throughout the Multiverse Saga, making it much more significant in hindsight than many initially realized.

The movie also captures the Avengers functioning as an established team before internal conflicts begin to pull them apart. Tony Stark's fears about protecting Earth, Bruce Banner's growing uncertainty, and Wanda's tragic beginnings all shape the paths these characters eventually follow. Several emotional callbacks in later MCU projects become much more impactful after revisiting Age of Ultron, making it an essential stop before Marvel's next massive crossover event.

Before the Avengers faced cosmic threats or multiversal incursions, they first had to survive each other. Captain America: Civil War fundamentally changes the MCU by splitting Earth's Mightiest Heroes into opposing sides following the Sokovia Accords. The emotional conflict between Steve Rogers and Tony Stark becomes one of the franchise's defining storylines, with consequences that ripple through Infinity War, Endgame and beyond.

The film is also packed with major introductions that remain incredibly relevant today. Tom Holland's Spider-Man makes his MCU debut, Chadwick Boseman's Black Panther immediately becomes a fan favorite, and characters like Sam Wilson, Bucky Barnes, and Wanda Maximoff receive meaningful development that shapes their future stories. Watching Civil War again highlights just how many of Marvel's current storylines trace back to this single film, making it one of the strongest foundations for Avengers: Doomsday.

Although Black Widow arrived in theaters after Avengers: Endgame, its story takes place shortly after the events of Captain America: Civil War. The film fills in a major gap in Natasha Romanoff's journey while introducing several characters who have gone on to become key players in the MCU's future. Yelena Belova, Red Guardian, Melina Vostokoff, and Taskmaster are all given meaningful backstories, making the movie far more than just Natasha's long-awaited solo adventure.

Its importance has only grown with the arrival of Marvel's newer team-focused projects. Yelena has emerged as one of the MCU's most compelling heroes, while Red Guardian continues to play an increasingly significant role alongside the next generation of Avengers. Watching Black Widow provides the emotional foundation for these relationships and makes their future appearances feel much more rewarding before Avengers: Doomsday brings multiple heroes together once again.

There are very few Marvel movies as essential to the Multiverse Saga as Avengers: Infinity War. Thanos' relentless pursuit of the Infinity Stones forever changes the lives of nearly every major MCU hero, pushing the Avengers to their breaking point while delivering one of the franchise's most unforgettable endings. The emotional impact of the Snap continues to influence Marvel's storytelling years later.

Beyond its heartbreaking finale, Infinity War also showcases nearly every major MCU hero fighting side by side, making it the closest comparison to the massive ensemble fans can expect in Avengers: Doomsday. The film reminds viewers of the sacrifices that shaped the current generation of heroes while setting the stage for the time-travel and multiverse consequences explored throughout later MCU projects.

If one MCU movie deserves to be watched immediately before Avengers: Doomsday, it is Avengers: Endgame. Serving as the emotional conclusion to the Infinity Saga, the film follows Earth's Mightiest Heroes as they attempt to reverse the Snap through time travel. Along the way, several iconic character arcs reach their natural conclusions, making it one of Marvel Studios' most emotional and celebrated films.

More importantly, Endgame introduces alternate timelines into the MCU in a way that directly influences the Multiverse Saga. The Avengers' time-heist, Loki's escape with the Tesseract, and the branching timelines become the foundation for several later projects, particularly Loki. Revisiting Endgame provides invaluable context for understanding why the MCU's multiverse exists in its current form before Doctor Doom enters the picture.

Among every Disney+ Marvel series released so far, Loki stands out as the single most important watch before Avengers: Doomsday. Picking up immediately after Loki's escape during Endgame, the series introduces audiences to the Time Variance Authority (TVA), variants, Nexus Events, and the Sacred Timeline. These concepts completely redefine how the MCU approaches time travel and alternate realities.

Beyond its world-building, the show transforms Loki from one of Marvel's greatest villains into one of its most layered protagonists. His journey through the TVA lays the groundwork for everything that follows in the Multiverse Saga, making Season 1 essential viewing for anyone hoping to fully understand the larger stakes of Avengers: Doomsday. Few Marvel projects have reshaped the franchise's mythology as dramatically as Loki.

Spider-Man: No Way Home proved that the multiverse could deliver emotional storytelling just as effectively as nostalgic fan service. By bringing together characters from previous Spider-Man franchises, the film became one of Marvel's biggest cinematic celebrations while showing how different universes could naturally collide within the MCU.

The movie also fundamentally changes Peter Parker's life, leaving him completely alone by its conclusion and setting the stage for his next chapter. Beyond Peter's personal story, No Way Home demonstrates how variants and legacy characters can coexist on screen, making it one of the clearest examples of the storytelling approach Marvel continues to embrace heading into Avengers: Doomsday.

While technically optional, WandaVision adds tremendous emotional depth to Wanda Maximoff's story before her next major appearance. The Disney+ series explores Wanda's grief following the events of Endgame, blending classic sitcom influences with psychological drama to create one of Marvel Studios' most unique projects.

The series also introduces important magical concepts, expands Scarlet Witch's powers, and establishes motivations that directly carry into Doctor Strange in the Multiverse of Madness. Even though Wanda's future remains uncertain, understanding her emotional journey makes the larger multiverse storyline far more compelling and provides additional context for the supernatural side of the MCU.

If Loki explains how the multiverse works, Doctor Strange in the Multiverse of Madness shows just how dangerous it can become. The film explores alternate realities, incursions, dreamwalking, and the devastating consequences of crossing between universes. These concepts are expected to play a central role in Avengers: Doomsday, making the movie one of the most essential entries in the Multiverse Saga.

The film also delivers memorable appearances from the Illuminati, including a variant of Professor Charles Xavier, offering a glimpse of Marvel's willingness to embrace legacy characters from outside the MCU. With multiple universes set to collide in Avengers: Doomsday, revisiting Doctor Strange's multiversal adventure feels more important than ever.

Shang-Chi and the Legend of the Ten Rings introduced one of Marvel's most exciting new heroes while expanding the MCU's mythology through the mysterious Ten Rings. The film balances emotional family drama with spectacular martial arts action, quickly establishing Shang-Chi as a fan-favorite addition to the franchise. It also broadens the MCU's mystical lore, hinting that the Ten Rings may be connected to a much larger mystery than fans initially realized.

With the character confirmed to return in Avengers: Doomsday, his origin story becomes essential viewing. The film explores his relationships, fighting abilities, and the mysterious power of the Ten Rings, all of which are likely to play a larger role as Marvel assembles another generation of Avengers to face Doctor Doom. Revisiting the film also serves as a reminder of why Shang-Chi has become one of the MCU's most promising new leaders heading into Marvel's biggest crossover event.

Following the heartbreaking loss of T'Challa, Black Panther: Wakanda Forever tells an emotional story about grief, legacy, and leadership. Shuri eventually embraces the mantle of Black Panther while Wakanda faces its greatest international challenge yet in the arrival of Namor and the underwater kingdom of Talokan. The film also explores how Wakanda adapts to a changing world without its king, making its emotional journey one of the MCU's most impactful.

The movie significantly expands Marvel's world by introducing Talokan, strengthening Wakanda's political importance, and developing characters expected to remain major players moving forward. Since Shuri, M'Baku, and Namor are all connected to the MCU's future, revisiting Wakanda Forever offers valuable context before the next Avengers assemble. With several of these characters expected to play important roles in the battle against Doctor Doom, the film serves as a crucial stepping stone toward Avengers: Doomsday.

While Thor: Love and Thunder focuses more on personal growth than multiverse storytelling, it remains an important chapter in Thor's journey. The God of Thunder confronts loss, reconnects with Jane Foster, and ultimately discovers a new purpose after years of fighting alongside the Avengers. The story offers a more reflective look at the hero, showing how years of sacrifice have reshaped both his outlook and his priorities.

The film also introduces Love, whose future role in the MCU remains full of potential. By the end of the movie, Thor is in a very different place emotionally than he was after Endgame, making this an important update before his expected return in Avengers: Doomsday. Revisiting the film helps explain Thor's mindset and where his story stands before he reunites with Marvel's biggest heroes once again.

Although Ant-Man and the Wasp: Quantumania received mixed reactions from audiences, its importance within the Multiverse Saga cannot be overlooked. The film expands Marvel's understanding of alternate dimensions through the Quantum Realm while introducing larger ideas about reality and multiversal threats. It also raises the stakes for the franchise by showing that dangers beyond Earth can threaten the very fabric of the multiverse.

It also continues the franchise's ongoing exploration of timelines and interconnected universes, concepts that have become increasingly central to the MCU. For fans hoping to understand every layer of Marvel's current direction, Quantumania remains a worthwhile addition to any Avengers: Doomsday marathon. Even with its divisive reception, the film provides valuable context for the multiversal conflicts that continue to shape Marvel's biggest stories.

Marvel's embrace of legacy characters makes revisiting Fox's Deadpool films and Logan more valuable than ever. Together, these movies establish Wade Wilson's irreverent personality, his complicated friendship with Wolverine, and the emotional history surrounding Hugh Jackman's beloved mutant. They also showcase the distinct tone and storytelling style that made Fox's Marvel universe so memorable long before its crossover with the MCU.

Logan in particular remains one of the most critically acclaimed superhero films ever made, offering a powerful farewell to Wolverine before his eventual return. Watching these films provides a much richer appreciation of the characters before they step into Marvel Studios' larger multiverse storyline. With both characters now playing a key role in Marvel's multiversal future, their earlier adventures carry even greater significance ahead of Avengers: Doomsday.

Few movies bridge Marvel's past and present as effectively as Deadpool & Wolverine. The film fully embraces the multiverse by bringing together characters from different franchises while celebrating Fox's Marvel legacy in ways that once seemed impossible. Packed with surprise appearances, callbacks, and references, it serves as both a love letter to Fox's Marvel era and a bold step into the MCU's future. 

Beyond its humor and action, the movie serves as one of the clearest connections between the Fox universe and the MCU. For anyone planning to watch Avengers: Doomsday, this is arguably the most important non-MCU film to include, as it demonstrates exactly how Marvel intends to merge characters from different cinematic universes. Its events make the idea of heroes from separate realities sharing the same battlefield feel far more natural ahead of Marvel's next blockbuster crossover.

Captain America: Brave New World marks the beginning of a new era for the Avengers by following Sam Wilson as he fully embraces the Captain America mantle. The film explores the political challenges of leading in a rapidly changing world while continuing Sam's evolution from Falcon to one of the MCU's central heroes. It also reinforces why Sam's version of Captain America is uniquely equipped to unite heroes during one of the MCU's most uncertain periods.

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As Marvel builds its next Avengers lineup, Sam's leadership becomes increasingly important. The movie also expands the franchise's current status quo, making it an essential stepping stone before Earth's Mightiest Heroes unite once again in Avengers: Doomsday. With the next Avengers team beginning to take shape, the film provides valuable insight into the leadership dynamics that could define Marvel's biggest crossover yet.

Thunderbolts introduces an unconventional team made up of antiheroes and morally complex characters who have largely operated on the fringes of the MCU. Featuring Yelena Belova, Red Guardian, Bucky Barnes, John Walker, Ghost, and others, the film offers a fresh perspective on heroism while exploring how these unlikely allies function as a team. Their contrasting personalities and complicated pasts make the group's dynamic unlike anything fans have seen from a traditional Avengers lineup.

Its events also establish important relationships and introduce developments that are expected to carry directly into Avengers: Doomsday. As Marvel continues reshaping its roster, Thunderbolts becomes one of the most significant recent additions to the franchise. For anyone hoping to understand how Marvel's newest heroes fit into the larger picture, this film serves as a crucial bridge to the next Avengers adventure.

Among every recent Marvel release, The Fantastic Four: First Steps may be the single biggest priority before Avengers: Doomsday. The movie introduces Marvel's First Family to the MCU while establishing Earth-828 and its place within the larger Multiverse Saga. It also gives audiences their first proper look at the team's dynamic, showcasing why Reed Richards, Sue Storm, Johnny Storm, and Ben Grimm have remained some of Marvel's most iconic heroes for decades.

Even more importantly, the film lays the foundation for Doctor Doom's arrival through its post-credits scene, making it one of the most direct lead-ins to Avengers: Doomsday. Anyone hoping to understand Reed Richards, Sue Storm, Johnny Storm, Ben Grimm, and Doom's place in the upcoming crossover should consider this essential viewing. With the Fantastic Four expected to play a central role in the battle ahead, skipping this film would mean missing one of the Multiverse Saga's most important setup chapters.

As the final theatrical MCU release before Avengers: Doomsday, Spider-Man: Brand New Day naturally carries significant importance. The film continues Peter Parker's story after the emotional ending of No Way Home, exploring his new life while setting the stage for his next major adventure. It also marks the beginning of a fresh chapter for the web-slinger as he navigates life without the support system that once defined his journey.

Although specific plot details remain under wraps, the movie is widely expected to leave Spider-Man in a position that connects directly to the next Avengers film. Watching it completes the current MCU timeline before Doctor Doom's arrival changes everything. As the final piece of the puzzle before Marvel's biggest crossover event, it could contain crucial developments that carry directly into Avengers: Doomsday.

The return of several legendary X-Men actors makes revisiting Fox's original mutant saga one of the most rewarding parts of any Avengers: Doomsday marathon. The ideal viewing order includes X-Men (2000), X2, X-Men: The Last Stand, and X-Men: Days of Future Past, which collectively establish the relationships between Professor X, Magneto, Cyclops, Beast, Mystique, Nightcrawler, and many other beloved mutants.

These films not only introduced a generation of fans to Marvel's mutants but also helped shape the modern superhero genre long before the MCU existed. With many of those iconic characters returning for Avengers: Doomsday, revisiting their original stories adds an extra layer of nostalgia and emotional payoff to Marvel's next multiversal crossover.

While Avengers: Doomsday is designed to be accessible even for casual audiences, watching these movies and TV shows dramatically enhances the experience. From the Infinity Saga's emotional highs to Loki's multiverse rules, the Fantastic Four's MCU debut, and the return of Fox's iconic mutants, every project adds another layer to Marvel's most ambitious crossover yet.

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Which Marvel movie or Disney+ series do you think is the most essential before Avengers: Doomsday? Let us know your must-watch pick in the comments!