Avengers: Doomsday Said to Feature Non-Stop, Massive Action From the Start

(Warning: This post contains potential spoilers for Marvel’s Avengers: Doomsday.)

The opening scene of Marvel’s Avengers: Doomsday will be the biggest action scene ever featured in MCU history.

As reported by insider John Campea on his recent podcast, the Russo Brothers were reportedly able to “eclipse everything else Marvel’s ever done” in terms of action in Avengers: Doomsday. The opening scene is said to “shoot you like a cannon out of the gate,” and the “massive action doesn’t let up.”

Campea said, “I have something I haven’t told you yet. What this person indicated to me was the sheer volume of action is going to eclipse everything else Marvel’s ever done.”

He added, “People are going to lose their minds. This movie starts with its foot through the floor and shoots you like a cannon out of the gate. There’s no slow start—it’s massive action right from the beginning, the scale is insane, and it doesn’t let up.”

We already reported that one scene in the opening of Avengers: Doomsday features the worlds of Deadpool, Wolverine, and Tobey Maguire‘s Spider-Man beginning to collide due to a multiverse incursion, but the Earths are saved by the TVA.

Directed by the Russo brothers from a screenplay by their longtime collaborator Stephen McFeely and Michael Waldron.

Here’s the plot synopsis for Avengers: Doomsday:

“Doctor Doom has officially arrived on the Marvel Cinematic Universe stage. This villain, a master of cutting-edge science and powerful magic, will unleash a cascading crisis across the multiverse. Marvel’s most iconic actor, Robert Downey Jr., also returns as Doctor Doom!”

Confirmed Cast for Avengers: Doomsday

Main MCU Heroes:

• Robert Downey Jr. – Doctor Doom
• Paul Rudd – Ant-Man
• Simu Liu – Shang-Chi
• Tom Hiddleston – Loki
• Florence Pugh – Yelena Belova
• Danny Ramirez – Falcon
• Sebastian Stan – Bucky Barnes
• Winston Duke – M’Baku
• Chris Hemsworth – Thor
• Letitia Wright – Black Panther
• Tenoch Huerta Mejía – Namor
• Anthony Mackie – Captain America
• David Harbour – Red Guardian
• Wyatt Russell – U.S. Agent
• Hannah John-Kamen – Ghost
• Lewis Pullman – Sentry

X-Men Universe:

• Ian McKellen – Magneto
• Patrick Stewart – Professor X
• Rebecca Romijn – Mystique
• James Marsden – Cyclops
• Kelsey Grammer – Beast
• Alan Cumming – Nightcrawler
• Channing Tatum – Gambit

Fantastic Four Universe:

• Pedro Pascal – Reed Richards (Mr. Fantastic)
• Vanessa Kirby – Sue Storm (Invisible Woman)
• Joseph Quinn – Johnny Storm (Human Torch)
• Ebon Moss-Bachrach – Ben Grimm (The Thing)

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, and Avengers: Secret Wars is scheduled for release on December 17, 2027.

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