The Headline Change: From Kang to Doom
Avengers: Doomsday was originally planned as Avengers: The Kang Dynasty, built around Jonathan Majors' Kang the Conqueror. That plan changed after Majors was dismissed from the role in December 2023, following a legal conviction for harassment and assault. Marvel restructured the film around a different villain entirely: Doctor Victor von Doom, played by returning franchise lead Robert Downey Jr. — marking his return to the MCU after his Tony Stark arc concluded in Avengers: Endgame.
The film is directed by Anthony and Joe Russo, who previously helmed Avengers: Infinity War and Avengers: Endgame, and is scheduled for release on December 18, 2026.
The Full Cast
The cast reveal, delivered via a livestream event, confirmed one of the largest ensembles in franchise history, combining Avengers characters with the X-Men cast introduced elsewhere in the multiverse saga:
| Actor | Character |
|---|---|
| Robert Downey Jr. | Victor von Doom / Doctor Doom |
| Chris Hemsworth | Thor |
| Anthony Mackie | Sam Wilson / Captain America |
| Sebastian Stan | Bucky Barnes |
| Letitia Wright | Shuri / Black Panther |
| Paul Rudd | Ant-Man |
| Florence Pugh | Yelena Belova |
| Vanessa Kirby | Sue Storm / Invisible Woman |
| Pedro Pascal | Reed Richards / Mister Fantastic |
| Simu Liu | Shang-Chi |
| Channing Tatum | Gambit |
| Ian McKellen | Magneto |
| Patrick Stewart | Professor X |
| Tom Hiddleston | Loki |
| Rebecca Romijn | Mystique |
| James Marsden | Cyclops |
The ensemble also includes Kelsey Grammer, Lewis Pullman, Danny Ramirez, Joseph Quinn, David Harbour, Winston Duke, Hannah John-Kamen, Tenoch Huerta Mejía, Ebon Moss-Bachrach, and Alan Cumming, among others.
Why the Reveal Was Framed as a "Reset"
The film is being positioned internally as a return to a more focused, character-driven story after the sprawling, less cohesive multiverse arcs of Phase Five — described by some involved with the project as a "Phase Zero" distillation. Bringing back Downey Jr. as the central antagonist rather than introducing an entirely new actor is itself part of that strategy: it trades a fresh face for built-in audience trust and continuity, at the cost of some narrative complexity around one actor playing both a beloved hero and now a major villain.
What Comes Next
Doomsday sets up the two-part conclusion to the Multiverse Saga, with Avengers: Secret Wars — also directed by the Russo brothers — following in 2027.
Why the Villain Changed From Kang to Doom
The film was originally announced as Avengers: The Kang Dynasty, built around Jonathan Majors' Kang the Conqueror. After Majors was dismissed from the role in December 2023 following a legal conviction, Marvel restructured the film around a different villain entirely: Doctor Victor von Doom, played by returning franchise lead Robert Downey Jr. — his return to the MCU after Tony Stark's arc concluded in Endgame.
The Combined Avengers and X-Men Lineup
The cast reveal confirmed one of the largest ensembles in franchise history, merging Avengers characters with the X-Men introduced elsewhere in the multiverse saga:
| Actor | Character |
|---|---|
| Robert Downey Jr. | Doctor Doom |
| Chris Hemsworth | Thor |
| Anthony Mackie | Captain America |
| Pedro Pascal | Mister Fantastic |
| Ian McKellen / Patrick Stewart | Magneto / Professor X |
| Channing Tatum, Tom Hiddleston, Florence Pugh, and dozens more | Various |
Why It's Framed as a Reset
The film is positioned internally as a return to a more focused, character-driven story after the sprawling multiverse arcs of Phase Five. Bringing back Downey Jr. as the central antagonist rather than an unknown actor trades a fresh face for built-in audience trust. Doomsday sets up the two-part conclusion to the Multiverse Saga, with Avengers: Secret Wars following in 2027.
Frequently Asked Questions
When does Avengers: Doomsday release?
Avengers: Doomsday is scheduled for December 18, 2026, directed by Anthony and Joe Russo.
Who does Robert Downey Jr. play in Avengers: Doomsday?
He plays Doctor Doom (Victor von Doom), a new role marking his return to the MCU after playing Iron Man.
Why did the film change from Kang to Doom?
After Jonathan Majors was dismissed from the Kang role in December 2023, Marvel restructured the film around Doctor Doom.