The upcoming Marvel Studios film Avengers: Doomsday is shaping up to be one of the most ambitious superhero movies ever made. Directed by Anthony and Joe Russo, the film brings together an unprecedented ensemble of characters from across the Marvel Cinematic Universe and beyond, including the Fantastic Four, X-Men, and New Avengers. With production underway and a release date set for December 18, 2026, fans are eagerly anticipating how these heroes will unite against the formidable Doctor Doom, played by Robert Downey Jr. Here are 10 characters that stand out in this massive lineup.
Robert Downey Jr. as Victor von Doom / Doctor Doom
Robert Downey Jr. makes a stunning return to the MCU, but this time as the iconic villain Victor von Doom. After famously portraying Tony Stark for over a decade, Downey now steps into the role of one of Marvel Comics’ most complex antagonists. Co-director Joe Russo described Doom as “three-dimensional and one of the most complex comic book characters,” adding that Downey was the ideal actor to take on the role. Downey has reportedly developed his own backstory for the character and contributed costume ideas, ensuring a fresh and compelling portrayal. His casting has generated immense excitement, marking a bold new chapter for the actor and the franchise.
Chris Hemsworth as Thor
The Asgardian god of thunder returns as a founding Avenger. Chris Hemsworth’s Thor has been a cornerstone of the MCU since his debut in 2011, and his role in Avengers: Doomsday is expected to be pivotal. As one of the most powerful heroes, Thor’s experience with cosmic threats and multiversal chaos will likely be invaluable in the battle against Doctor Doom. Hemsworth’s charismatic performance and the character’s evolution from a brash prince to a seasoned leader make him a fan favorite.
Pedro Pascal as Reed Richards / Mister Fantastic
Pedro Pascal brings his star power to the MCU as Reed Richards, the brilliant leader of the Fantastic Four. Richards is known for his intellect and ability to stretch his body to incredible lengths, but his expertise in multiversal research could be key to the plot. As seen in The Fantastic Four: First Steps, Richards has been studying alternate realities, suggesting he may play a central role in addressing the multiverse challenges in Avengers: Doomsday. Pascal’s casting has been met with widespread approval, and fans are excited to see his dynamic with other heroes.
Vanessa Kirby as Sue Storm / Invisible Woman
Vanessa Kirby joins the MCU as Sue Storm, a core member of the Fantastic Four. Sue’s abilities to generate force fields and turn invisible make her a versatile and powerful hero. Her presence alongside Reed Richards and the other Fantastic Four members adds a new dynamic to the Avengers’ roster. Kirby’s proven talent in action and drama roles suggests she will deliver a memorable performance, potentially as both a hero and a strategic leader.
Patrick Stewart and Ian McKellen as Charles Xavier and Magneto
Two legendary actors reprise their iconic roles: Patrick Stewart as Charles Xavier (Professor X) and Ian McKellen as Erik Lehnsherr (Magneto). Their return signals the full integration of the X-Men into the MCU. Professor X’s telepathic powers and leadership, combined with Magneto’s control over magnetic fields, could drastically shift the balance of power in the fight against Doom. Their involvement also hints at possible reconciliations or conflicts within the superhero community, adding depth to the narrative.
Tom Hiddleston as Loki
The god of mischief returns, with Tom Hiddleston once again portraying Loki. After the events of the Loki series, where Loki became a key figure in managing the multiverse, his role in Avengers: Doomsday is highly anticipated. Loki’s cunning, magical abilities, and complex morality make him a wild card. Whether as an ally or a trickster, his presence is sure to add intrigue and unpredictability to the story.
Ryan Reynolds as Wade Wilson / Deadpool
While there are conflicting reports about his involvement, Ryan Reynolds is expected to reprise his role as Deadpool. Known for breaking the fourth wall and his irreverent humor, Deadpool’s inclusion could provide comic relief amid the film’s dramatic tone. However, directors the Russo brothers have emphasized a serious approach, so it will be interesting to see how Deadpool fits into this larger narrative. His potential interactions with other heroes, particularly the X-Men, are eagerly awaited.
Anthony Mackie as Sam Wilson / Captain America
Anthony Mackie returns as Sam Wilson, who has fully embraced the mantle of Captain America. As a seasoned Avenger and leader, Sam’s strategic mind and combat skills will be crucial in coordinating the team. His journey from the Falcon to Captain America has been a highlight of the MCU, and his role in uniting such a diverse group of heroes will be a central theme in the film.
Simu Liu as Xu Shang-Chi
Simu Liu reprises his role as Shang-Chi, the master of the Ten Rings. Since his debut in Shang-Chi and the Legend of the Ten Rings, he has been established as a powerful new hero. His martial arts skills and mystical artifacts make him a unique asset in the battle against Doom. Shang-Chi’s integration into the Avengers lineup represents the evolving diversity of the MCU’s hero roster.
Kelsey Grammer as Hank McCoy / Beast
Kelsey Grammer returns as Beast, the blue-furred mutant genius from the X-Men. Grammer first portrayed the character in X-Men: The Last Stand (2006) and now brings him into the MCU. Beast’s scientific expertise and physical prowess could play a significant role in the film. Alan Cumming, who reprises his role as Nightcrawler, mentioned that the makeup process for mutants has been streamlined, making it easier for actors to return to their roles.
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