(Warning: This post contains potential spoilers for Marvel’s Avengers: Doomsday.)
Robert Downey Jr.‘s Doctor Doom will be taking down the TVA (Time Variance Authority)—the organization that monitors the multiverse—in Marvel’s Avengers: Doomsday.

According to insider James Mack, who leaked major plot details of Doomsday, Doctor Doom will completely destroy the TVA in Avengers: Doomsday. Also, there will be a “death” of an Avenger as a form of sacrifice to save Sylvie (Sophia Di Martino).

In the film, the TVA will assemble a team of variant heroes, including Captain Carter, Deadpool, Wolverine, and Laura Kinney (X-23).
We reported that Di Martino’s Sylvie was recently spotted on the set of Doomsday. Sylvie will be guiding the Avengers, the Fantastic Four, and the X-Men on matters related to the Time Variance Authority (TVA), the Void, and Loki.
Here’s the short plot details of Avengers: Doomsday:
In Doomsday, Shuri discovers multiversal incursions threatening Earth-616. She warns Sam Wilson, Wong, Banner, and Carol Danvers using a hologram, leading to a larger meeting in Wakanda. Meanwhile, the Fantastic Four arrive, revealing Doctor Doom has kidnapped Franklin Richards and is in a parallel universe, along with Galactus’s involvement.
Shuri detects Monica Rambeau trapped in the colliding universe. Reed confirms Doom and Franklin are there too. A mission forms with three goals: stop the Incursion, rescue Monica, and save Franklin from Doom. America Chavez opens the portal. Sam Wilson leads the Avengers, alongside the Fantastic Four, Thunderbolts, Wakandans, Namor, and others. The conflict is between Earth-616 and the X-Men’s universe, with a deeper plot involving Doom, the TVA, and Loki. While the main heroes enter the alternate world, others stay behind to defend Earth-616 from an unknown invasion.
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 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, 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 Bob Reynolds/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.
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