The Multiverse's Mightiest: The 20+ Confirmed And Rumored Cast Members For The Next Two Avengers Movies

The Marvel Cinematic Universe (MCU) is preparing for its most ambitious crossover event since Avengers: Endgame, and the cast list for the upcoming films is nothing short of seismic. As of December 15, 2025, the latest reports and official confirmations for the two climactic films of the Multiverse Saga—*Avengers: Doomsday* (formerly *The Kang Dynasty*) and *Avengers: Secret Wars*—point toward an unprecedented ensemble that blends the new generation of heroes with the long-awaited return of the MCU's founding legends.

The transition from Phase 4 and 5 into Phase 6 is set to culminate in a multiversal war, requiring a roster of heroes far exceeding any previous team-up. Fans are buzzing over the rumored return of several key original actors, alongside the established new leaders of the Avengers team. This is a deep dive into the confirmed, rumored, and highly anticipated cast members set to define the future of the MCU.

The Main Cast: Biographical Profiles and Roles in the Multiverse Saga

The next two *Avengers* films will feature a mix of returning veterans and established new leaders. Here is a look at the key actors leading the charge and their essential biographical details.

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• Anthony Mackie (Sam Wilson / Captain America)
  • Born: September 23, 1978, New Orleans, Louisiana, U.S.
  • Key Roles: Known for *The Hurt Locker*, *8 Mile*, and his breakout role as Sam Wilson/Falcon in the MCU.
  • MCU Status: Having officially taken on the mantle of Captain America in the series *The Falcon and the Winter Soldier*, Mackie is positioned as the new, definitive leader of the Avengers team in the Multiverse Saga.
• Letitia Wright (Shuri / Black Panther)
  • Born: October 31, 1993, Georgetown, Guyana (Guyanese-British actress).
  • Key Roles: Gained global recognition as Shuri, T'Challa's sister, in *Black Panther*, and starred in the critically acclaimed series *Black Mirror*.
  • MCU Status: Following the events of *Black Panther: Wakanda Forever*, Shuri is the current Black Panther and one of the most brilliant minds in the MCU, making her crucial for any multiversal threat.
• Robert Downey Jr. (Tony Stark / Iron Man) - *Rumored Return*
  • Born: April 4, 1965, New York City, New York, U.S.
  • Key Roles: An Oscar-winning actor, celebrated for roles in *Iron Man*, *Sherlock Holmes*, and the recent film *Oppenheimer*.
  • MCU Status: Though his character famously died in *Avengers: Endgame*, multiple high-profile reports suggest a return, likely as a variant or through a multiversal plot device, for *Secret Wars*.
• Chris Evans (Steve Rogers / Captain America) - *Rumored Return*
  • Born: June 13, 1981, Boston, Massachusetts, U.S.
  • Key Roles: Best known for portraying Steve Rogers/Captain America, with other notable performances in *Knives Out* and *Fantastic Four*.
  • MCU Status: Like Downey Jr., his return is a massive rumor, potentially as a different version of Captain America or the aged Steve Rogers, to aid in the multiversal conflict.

The Multiverse Ensemble: Confirmed and Highly Rumored Returning Heroes

The sheer scale of a Multiverse Saga finale demands a cast that spans the entire history of the MCU. *Avengers: Doomsday* is set to be the ultimate mash-up, bringing together the new generation and, most excitingly, the original team.

The Original Avengers and Foundational Heroes

The most shocking and highly reported news involves the alleged return of the core six Avengers. While the specifics of their return are tightly guarded, the implications for the plot of *Secret Wars* are monumental.

• Chris Hemsworth (Thor): One of the few original heroes whose character is still active and alive in the main timeline. His return is expected for both films.
• Mark Ruffalo (Bruce Banner / Hulk): The Smart Hulk is a key figure in the MCU's current landscape and is expected to be a major player.
• Scarlett Johansson (Natasha Romanoff / Black Widow): Her character also died in *Endgame*, but a multiversal variant or flashback is heavily rumored.
• Jeremy Renner (Clint Barton / Hawkeye): Expected to return, likely in a supporting or mentor role for the younger heroes.

The confirmed and rumored involvement of all six original actors is the biggest casting story of the current cycle, promising a true generational team-up.

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The New Guard and Multiverse Players

These are the heroes who have been established in Phase 4 and Phase 5 and are expected to form the backbone of the new Avengers team.

• Sebastian Stan (Bucky Barnes / Winter Soldier): A confirmed returning cast member, Bucky Barnes is a seasoned veteran who will fight alongside the new Captain America.
• Paul Rudd (Scott Lang / Ant-Man): Ant-Man’s knowledge of the Quantum Realm and his experience with Kang the Conqueror will be vital.
• Benedict Cumberbatch (Stephen Strange / Doctor Strange): As the master of the mystic arts and a key figure in the Multiverse, his role is indispensable for both *Doomsday* and *Secret Wars*.
• Brie Larson (Carol Danvers / Captain Marvel): A powerhouse hero whose cosmic capabilities are essential for an interdimensional threat.
• Don Cheadle (James Rhodes / War Machine): His character is set to have a major arc leading up to the Avengers films, making his involvement certain.
• Benedict Wong (Wong): The Sorcerer Supreme will be a key strategic asset.
• Karen Gillan (Nebula): A surviving member of the Guardians of the Galaxy with deep knowledge of cosmic threats.
• Wyatt Russell (John Walker / U.S. Agent): The anti-hero from *The Falcon and the Winter Soldier* is rumored to return, possibly as part of a darker government-sponsored team.

New Additions and The Fantastic Four Connection

One of the most exciting aspects of the *Doomsday* cast list is the inclusion of new characters who will make their first appearance in an *Avengers* film, directly tying into other upcoming Phase 6 projects.

The Multiverse Saga is set to formally introduce the Fantastic Four, and early casting reports for *Avengers: Doomsday* strongly suggest their immediate involvement in the crisis.

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• Vanessa Kirby (Sue Storm / Invisible Woman): Kirby is reportedly confirmed to be part of the *Doomsday* ensemble, indicating that the Fantastic Four will play a major role in the fight against the multiversal threat.

While the rest of the Fantastic Four cast (Mister Fantastic, The Human Torch, and The Thing) have not yet been officially confirmed for the *Avengers* films, the inclusion of the Invisible Woman suggests that all four members will be ready to join the fray.

The Villain and The Threat of Doomsday

The films were originally titled *The Kang Dynasty*, setting up Jonathan Majors to reprise his role as Kang the Conqueror, the central villain of the Multiverse Saga. Despite the title change to *Avengers: Doomsday*, which suggests a shift in focus or a new primary threat, reports still mention Majors' involvement. The core conflict, however, remains the collapse of the Multiverse, which will require the combined might of every hero ever introduced.

The sheer number of entities involved—from the original six to the new Captain America, Black Panther, the Fantastic Four, and the cosmic heroes—guarantees that *Avengers: Doomsday* and *Avengers: Secret Wars* will be the two largest and most consequential films in the history of the MCU. The final cast list will truly represent the culmination of over a decade of interconnected storytelling, promising a spectacle that will redefine the superhero genre once again.