🎬 Core MCU Avengers & Allies

• Chris Hemsworth — Thor

• Anthony Mackie — Sam Wilson / Captain America

• Sebastian Stan — Bucky Barnes / Winter Soldier

• Paul Rudd — Scott Lang / Ant-Man

• Letitia Wright — Shuri / Black Panther

• Simu Liu — Shang-Chi

• Florence Pugh — Yelena Belova

• David Harbour — Red Guardian

• Wyatt Russell — John Walker / U.S. Agent

• Danny Ramirez — Joaquin Torres / Falcon

• Hannah John-Kamen — Ava Starr / Ghost

• Winston Duke — M’Baku

• Tenoch Huerta Mejía — Namor

• Lewis Pullman — Bob / Sentry

This lineup blends legacy Avengers with newer Phase 4–5 characters, setting up a more morally grey, power-heavy team than earlier films.

🛡 Fantastic Four (Major MCU Crossover)

• Pedro Pascal — Reed Richards / Mister Fantastic

• Vanessa Kirby — Sue Storm / Invisible Woman

• Joseph Quinn — Johnny Storm / Human Torch

• Ebon Moss-Bachrach — Ben Grimm / The Thing

Their inclusion signals the Fantastic Four as central players rather than side cameos, especially with Doom at the center of the story.

🧬 X-Men Legacy Returns

• Patrick Stewart — Professor Charles Xavier

• Ian McKellen — Magneto

• Kelsey Grammer — Beast

• Rebecca Romijn — Mystique

• James Marsden — Cyclops

• Alan Cumming — Nightcrawler

• Channing Tatum — Gambit

These are legacy versions from the pre-MCU X-Men films, confirming a full multiverse crossover rather than soft reboots.

🦹 Main Villain

• Robert Downey Jr. — Victor von Doom / Doctor Doom

A massive twist: Downey returns to the MCU not as Iron Man, but as Doom — positioning the character as a multiversal threat with emotional and thematic weight tied to Tony Stark’s legacy.

🧩 What This Cast Tells Us

• This is Endgame-level scale, if not bigger

• Avengers, Fantastic Four, and X-Men all collide

• Heavy focus on multiverse consequences

• Doom is being treated as a long-term saga villain, not a one-off