Latest Update: June 21, 2026 — Robert Downey Jr. is selling Doomsday as the “antidote” to Marvel’s post-Endgame slump — which is a bigger admission than it sounds. Meanwhile, Disney has now hit the new leaked footage with takedown notices.
This is the big one. Avengers: Doomsday is the movie the entire Multiverse Saga has been building toward, the largest cast Marvel has ever assembled, Robert Downey Jr. returning to the MCU not as Iron Man but as Doctor Doom, and the setup for everything that follows. Here’s our running breakdown of everything we know: release date, the staggering cast list, the plot, where the trailer actually is, and how it sets up Secret Wars. We update it the moment anything breaks, so bookmark it and check back.
Avengers: Doomsday Release Date
Avengers: Doomsday hits theaters December 18, 2026. It was originally dated for May 2026 before Marvel pushed it (and its sequel) back, which is why it now anchors the end of the year instead of the summer.
Avengers: Doomsday Cast
This is the headline. Doomsday assembles the biggest ensemble in MCU history — heroes from three different movie universes colliding. Confirmed and announced names include:
- Robert Downey Jr. as Victor Von Doom / Doctor Doom
- Chris Evans as Steve Rogers — his MCU return, revealed in the first teaser
- Chris Hemsworth as Thor
- Anthony Mackie as Captain America
- Tom Hiddleston as Loki
- Sebastian Stan, Letitia Wright (Shuri), Paul Rudd (Ant-Man), Florence Pugh (Yelena), Simu Liu (Shang-Chi)
- The Fantastic Four: Pedro Pascal (Reed Richards), Vanessa Kirby, Ebon Moss-Bachrach (The Thing), Joseph Quinn
- Legacy X-Men: Patrick Stewart, Ian McKellen, James Marsden, Rebecca Romijn, Kelsey Grammer, Alan Cumming, with Channing Tatum’s Gambit
…and that’s not the full list. The lineup runs well past two dozen, and with reshoots reportedly still happening, expect it to keep shifting right up to release.
Robert Downey Jr. as Doctor Doom
The biggest swing of all: Robert Downey Jr., the man who built the MCU as Iron Man, returns as its new big bad. The Doom casting was the showstopper reveal at San Diego Comic-Con 2024, and the costume itself is still being teased rather than fully unveiled — most recently with RDJ surfacing at the Russos’ SXSW panel. We covered that here: Robert Downey Jr. surprises fans as the Doctor Doom costume gets hyped.
Avengers: Doomsday Story
Marvel is keeping the official synopsis under wraps, but the shape is clear: Doomsday is the penultimate chapter of the Multiverse Saga, bringing heroes from multiple universes onto a collision course against Doom as the fate of the multiverse hangs in the balance. It’s designed to lead directly into Avengers: Secret Wars.
Is There an Avengers: Doomsday Trailer?
Sort of, and this is where it gets frustrating for fans. Marvel has released four teasers (spotlighting Steve Rogers, Thor, the X-Men, and Shuri among others), and a full trailer was reportedly screened at CinemaCon, but that footage was never released to the public. So there’s no full public trailer yet, which is exactly why every Russo Brothers social-media tease sends fans into a frenzy. We’ve been tracking each one:
- The “Latveria” tease that turned out to be just coffee
- When the Russos teased a trailer could drop
- The green tease that started the speculation
UPDATE: While the Russos’ green teases led to coffee instead of footage, Marvel finally gave Doomsday some shape with an official Disney synopsis teasing three colliding universes, backed by comments from the New Avengers cast. Now the footage fans were chasing has leaked, with a pixelated bootleg clip widely believed to be real giving the first wide look at Doctor Doom tearing into the X-Men.
Who Is Directing Avengers: Doomsday?
Doomsday is directed by Joe and Anthony Russo, returning to Marvel after Infinity War and Endgame, working from a script by Stephen McFeely. The Russos are also helming the sequel, Secret Wars.
How Doomsday Leads Into Avengers: Secret Wars
Doomsday isn’t the finish line — it’s the setup. Avengers: Secret Wars follows on December 17, 2027, and the Russos have confirmed it’s already in pre-production: Avengers: Secret Wars already in pre-production, say the Russo Brothers.
The Latest Avengers: Doomsday News
Everything we’ve been tracking as it breaks:
- Disney Takedowns Confirm Avengers: Doomsday Leak Chaos: Doom, X-Men, More
- Who Really Lifts Mjolnir in Avengers: Doomsday? The Leaks Don’t Agree
- Leak Looks More Real — But It Comes With a Catch
- RDJ Says Avengers: Doomsday Can Fix Marvel — Which Is the Real Admission
- Leak’s Biggest Red Flag Is Marvel’s Silence
- Leak: Doctor Doom Tears Into the X-Men in Footage Fans Are Calling Real
- Synopsis Teases Three Universes — And The New Avengers Are Backing It Up
- Robert Downey Jr. surprises fans as Doctor Doom costume gets hyped
- Doomsday trailer tease goes flat as the big surprise is just coffee
- Doomsday trailer could drop tomorrow as Russos tease Latveria surprise
- Russos tease green as Doomsday trailer speculation builds
- Avengers: Secret Wars already in pre-production
Avengers: Doomsday hits theaters December 18, 2026. We’ll keep this guide updated as more is confirmed.
