Note: This post contains spoilers for Marvel’s Avengers: Doomsday and Secret Wars.
Benedict Cumberbatch is confirmed to return as Doctor Strange and will play a major role in Avengers: Secret Wars and also appear in Avengers: Doomsday (although Marvel has not yet announced Cumberbatch in the first wave of casting announcements).
According to Alex Perez (via The Cosmic Circus), Doctor Strange’s mission in Avengers: Doomsday will be to “fix an incursion… by any means necessary.” This will make Strange one of the main figures holding the multiverse together before the full reset.
We will also see what Strange and Clea have been up to between the ending of Doctor Strange in the Multiverse of Madness and the upcoming Avengers films. Their journey will expand on the Dark Dimension storyline, which is critical to understanding incursions. Because time flows differently in the Dark Dimension—essentially nonexistent or immeasurable—while only three to four years have passed on Earth, much more time could have passed for Strange and Clea. So, Strange may return with greater experience, power, and knowledge than when fans last saw him.
Alex also revealed that Strange’s actions in Avengers: Doomsday could directly set up Secret Wars and the multiverse reset. The Dark Dimension’s unique time rules also give Marvel a way to “level up” Strange without requiring years of on-screen development. Meanwhile, Clea’s presence hints at the future formation of the Midnight Sons while also tying Strange more deeply into the multiverse conflict.
Directed by the Russo brothers from a screenplay by their longtime collaborator Stephen McFeely, Avengers: Doomsday is now being co-written by McFeely and Michael Waldron, the creator and head writer of the Loki series. The film features cinematography by Newton Thomas Sigel (Bohemian Rhapsody, X-Men: Days of Future Past) and production design by Kasra Farahani.
The official cast members of the film include Robert Downey Jr. as Doctor Doom, Paul Rudd as Ant-Man, Simu Liu as Shang-Chi, Tom Hiddleston as Loki, Florence Pugh as Yelena Belova, Danny Ramirez as Falcon, Sebastian Stan as Bucky Barnes, Winston Duke as M’Baku, Chris Hemsworth as Thor, Letitia Wright as Black Panther, Tenoch Huerta Mejía as Namor, Anthony Mackie as Captain America, David Harbour as Red Guardian, Wyatt Russell as U.S. Agent, and Hannah John-Kamen as Ghost. Ian McKellen as Magneto, Patrick Stewart as Professor X, Rebecca Romijn as Mystique, James Marsden as Cyclops, Kelsey Grammer as Beast, Alan Cumming as Nightcrawler, and Channing Tatum as Gambit. Pedro Pascal as Reed Richards (Mr. Fantastic), Vanessa Kirby as Sue Storm (Invisible Woman), Joseph Quinn as Johnny Storm (Human Torch), Ebon Moss-Bachrach as Ben Grimm (The Thing), and Lewis Pullman as Sentry.
Produced by Kevin Feige, Louis D’Esposito, and Russo Brothers will produce through their AGBO banner.
Avengers: Doomsday will be released in theaters and IMAX across the United States on December 18, 2026.
Source: The Cosmic Circus
