THUNDERBOLTS* Star Confirms Return For AVENGERS: DOOMSDAY Reshoots: "[The Movie] Is Massive"

THUNDERBOLTS* Star Confirms Return For AVENGERS: DOOMSDAY Reshoots: "[The Movie] Is Massive"

Thunderbolts* star David Harbour has confirmed that he'll be part of Avengers: Doomsday's upcoming reshoots, and teases the epic scale of the Russo Brothers' MCU return.

By JoshWilding - Feb 25, 2026 07:02 AM EST
Filed Under: Avengers: Doomsday

Avengers: Doomsday reshoots are scheduled for April (possibly March), and Black Widow and Thunderbolts* star David Harbour has now confirmed that he'll be part of them.

The Stranger Things star is expected to have a sizeable role in the movie as Red Guardian, especially as he's a member of the New Avengers. It's also previously been reported that Alexi Shostakov will develop a friendship with Ben Grimm, a.k.a. The Thing.

Rumour has it, Avengers: Doomsday may have started shooting without a finished script. However, after filming wrapped last September, Marvel Studios and the Russo Brothers have had plenty of time to refine the story and figure out the best way to bridge the gap to 2027's Avengers: Secret Wars.

Talking in the video below, Harbour says, "I've been working a lot. Keeping busy. And this little Avengers movie that we got in London. They got a couple more days they want to do. I'm heading there soon [and] actually going to London for a couple of days. There's a little more filming coming up for 'Avengers: Doomsday.'"

"I'm really excited about it. The chemistry with Sebastian [Stan] and Wyatt [Russell] on set was fantastic, so I'm looking forward to getting back in there," the actor continued, adding with a laugh, "You know I can't say anything. But it's gonna be fun. The Russos are killing it, and the whole thing is shaping up to be massive."

It's not exactly a spoiler that Red Guardian will be spending time with Bucky Barnes and U.S. Agent, seeing as they're part of the same superhero team. Thunderbolts* struggled at the box office, though that's unlikely to impact plans for the New Avengers in Avengers: Doomsday.

The movie is expected to feature many casualties, which are inevitable as the Final Incursion beckons. Will Alexi be among those who fall in battle against Doctor Doom? That remains to be seen. 

You can hear more from Harbour in the player below.

Avengers: Doomsday officially stars Chris Evans, Chris Hemsworth, Anthony Mackie, Winston Duke, Tom Hiddleston, Sebastian Stan, Letitia Wright, Paul Rudd, and Robert Downey Jr. Wyatt Russell, Simu Liu, Tenoch Huerta Mejia, Mabel Cadena, Florence Pugh, Danny Ramirez, David Harbour, Hannah John-Kamen, Lewis Pullman, and India Rose Hemsworth all make their Avengers franchise debuts.

The Fantastic Four: First Steps leads Pedro Pascal, Vanessa Kirby, Ebon Moss-Bachrach, and Joseph Quinn join them, as do X-Men franchise stars Kelsey Grammer, Patrick Stewart, Ian McKellen, Alan Cumming, Rebecca Romijn, James Marsden, with Deadpool & Wolverine star Channing Tatum. The trades have pointed to Ryan Reynolds and Hayley Atwell also appearing in Avengers: Doomsday.

The Russo Brothers direct Avengers: Doomsday and Avengers: Secret Wars from a screenplay by Stephen McFeely, with whom they previously collaborated on the Avengers and Captain America franchises. Loki and Doctor Strange in the Multiverse of Madness's Michael Waldron has also been enlisted to help.

Avengers: Doomsday is set to be released on December 18, with Avengers: Secret Wars scheduled to arrive on December 17, 2027.

About The Author:
JoshWilding
Member Since 3/13/2009
Comic Book Reader. Film Lover. WWE and F1 Fan. Rotten Tomatoes-approved critic and ComicBookMovie.com's #1 contributor.
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hue66
hue66 - 2/25/2026, 8:03 AM
He's not going to fall. Even though thunderbolts didn't earn much the characters are great. They'll keep them around.
ferf
ferf - 2/25/2026, 8:05 AM
They are writing the plot in post production
Urubrodi
Urubrodi - 2/25/2026, 8:24 AM
@ferf - What matters in the end is if the movie turns out good or not. As far as Avengers films go, they are yet to fail.
Apophis71
Apophis71 - 2/25/2026, 9:38 AM
@ferf - A script not finished at start of the filming never means the plot isn't locked down, only that some aspects may be in flux such a specific lines/scenes within the framework of the plot.

ALL that matters is if the end product is good or not however, not the process making it for us as viewers, I mean there absolutely wasn't a fully formed plot or almost any script when they started the first Iron Man film, literally were making it up as they went along, and most hold that as one of the best of the MCU still.
TheVisionary25
TheVisionary25 - 2/25/2026, 8:22 AM
Cool , not surprising that Marvel still has a couple or so days of reshoots/additional photography it seems whether it be due to scheduling & such on Doomsday…

However, I wouldn’t be surprised if someone on here twists something negative out of it like them still writing the script or whatever even though it’s been Marvel’s usual practice from the beginning.

Anyway , I like Harbour’s tragicomic performance as Alexei aswell as this version of the character but I have a feeling he may not be long for this world with him biting the dust in Doomsday or Secret Wars!!.

User Comment Image
dragon316
dragon316 - 2/25/2026, 8:24 AM
Of course they will return there no eternals there movie was better eternals more fun more entertaining watch
bobevanz
bobevanz - 2/25/2026, 8:26 AM
Thunderbolts was the best comic book movie last year and it's not even close
JackDeth
JackDeth - 2/25/2026, 8:29 AM
Sure would be nice to see a trailer
TheVisionary25
TheVisionary25 - 2/25/2026, 9:24 AM
@JackDeth - I wouldn’t be surprised if we get a proper teaser with BND in July.
TheLobster
TheLobster - 2/25/2026, 10:50 AM
I swear if they kill him off..
vectorsigma
vectorsigma - 2/25/2026, 12:08 PM
A decent script will not return in Avengers: Doomsday
Patient2670
Patient2670 - 2/25/2026, 12:32 PM
Very often in post production, when the get to see a first assembly of the movie, producers and directors will have changes or ideas they want to impliment. Rewrites after principle photography aren't unusual, just like reshoots or pick-ups for shots that the find they need or want, and just didn't get. I'm not worried. It's going to be an Avengers movie and people's mileage may vary.
Spike101
Spike101 - 2/25/2026, 2:43 PM
One of the worst characters at the moment, and only there for laughs. I cringe at every scene just waiting for him to ruin it.
MarvelZombie616
MarvelZombie616 - 2/25/2026, 4:50 PM
@Spike101 - No he is actually wise.
Watch The movie again when you are older. Like Gusto.
Spike101
Spike101 - 2/25/2026, 4:59 PM
@MarvelZombie616 - I’m already old, and he’s still a shit character.

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