David Harbour Drops Huge Bomb About Avengers: Doomsday
David Harbour just dropped a Marvel tease so big it makes every past Avengers cliffhanger look tiny.
Marvel is loading the table for Avengers: Doomsday like it plans to feed an army. The cast is stacked (and that is just the confirmed side of the board), the Russo brothers are back in the big chair, and David Harbour says the whole thing is, in his words, enormous. No notes on subtlety here.
Harbour says the Russos have the secret sauce
Harbour, who is carrying his Red Guardian over from Thunderbolts*, talked to ScreenRant about being on the Doomsday set and basically sounded like someone walking into a sports stadium for the first time. He cannot believe the scale, he cannot believe the headcount, and he really cannot believe how smoothly Joe and Anthony Russo seem to run the circus.
'They have a special sauce... they just know how to do these things.'
He pointed to the way their earlier MCU films balanced tones and spectacle — think the plate-spinning in Captain America: Civil War and the controlled chaos of Infinity War — and said this one layers comedy, drama, surprises, and sheer size the same way. He also doubled down on the scale: he has never been on a set like this. The inside baseball bit? He referenced all those chairs and the trailers to match — basically, every familiar face in the room has their own base camp — and described looking around while someone is giving A Big Speech and going, oh right, I am in that movie.
The cast (so far)
- Chris Hemsworth as Thor
- Vanessa Kirby as Sue Storm
- Sebastian Stan as Bucky Barnes
- Letitia Wright as Shuri
- Anthony Mackie as Sam Wilson
- Paul Rudd as Scott Lang
- Wyatt Russell as John Walker
- Tenoch Huerta Mejía as Namor
- Ebon Moss-Bachrach as Ben Grimm
- Simi Liu as Shang-Chi
- Florence Pugh as Yelena Belova
- Kelsey Grammer as Hank McCoy
- Lewis Pullman as Bob
- Danny Ramirez as Joaquin Torres
- Joseph Quinn as Johnny Storm
- David Harbour as Red Guardian
- Winston Duke as M'Baku
- Hannah John-Kamen as Ghost
- Tom Hiddleston as Loki
- Patrick Stewart as Charles Xavier
- Ian McKellen as Erik Lehnsherr
- Alan Cumming as Kurt Wagner
- Rebecca Romijn as Raven Darkholme
- James Marsden as Scott Summers
- Channing Tatum as Remy LeBeau
- Pedro Pascal as Reed Richards
- Robert Downey Jr. as Victor von Doom
Yes, that is a wild lineup. Classic Avengers, the new Fantastic Four, a pile of X-Men veterans, a couple Thunderbolts, and Loki wandering through like it is a Tuesday. And if you are raising an eyebrow at Robert Downey Jr. as Victor von Doom, you are not alone. That is a swing.
Release timing
Avengers: Doomsday is set to hit theaters on December 18, 2026.
One odd wrinkle
In the middle of all this, Ryan Reynolds recently said he has not stepped foot on the Doomsday set. Not a red flag, just a reminder that with a machine this big, not every piece moves at the same time.
Bottom line: the Russos returning to orchestrate this many characters is exactly the kind of high-wire act they made look easy before. If Harbour is right about the scale, Marvel is aiming for a true all-hands event.