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April 28, 2024, isn’t just another day for Marvel fans — it’s the moment when the next era of the MCU officially kicks into overdrive. That’s the day filming begins on Avengers: Doomsday, the first of two upcoming Avengers epics set to redefine the franchise’s future. With cameras rolling at last, Marvel Studios is unleashing a cinematic storm that promises to unite fan-favorite heroes, introduce legendary villains, and dive headfirst into the multiverse madness — all while giving Robert Downey Jr. a gloriously unexpected second act.

Filming Begins On Avengers: Doomsday — And The Excitement Is Unmatched

Marvel President Kevin Feige confirmed during a global press event for Thunderbolts* that production on Avengers: Doomsday will officially start this Monday, April 28. Despite rumors suggesting filming had already begun, this announcement made it clear that the next big MCU chapter is truly underway. And with the Russo Brothers back at the helm, the sense of anticipation is through the roof.

“Avengers movies are always about incredible actors... who’ve never met before on screen, meeting for the first time and interacting in ways that they’ve never interacted before,” Feige said. It’s a sentiment that cuts to the core of what these ensemble events have always been about — chemistry, collision, and cosmic consequence.

Robert Downey Jr.’s Doctor Doom Teases A Multiversal Masterstroke

Perhaps the most jaw-dropping element of this reveal came not from the cast of heroes, but from a single image posted by the Russos: a director’s chair labeled Victor Von Doom. The iconic filmmaking duo captioned the photo simply with, “Day one…” — a subtle yet seismic confirmation that Downey Jr. is back in the MCU, and not as Tony Stark.

After years of speculation, Marvel has pulled off one of its most ambitious casting gambits yet by reintroducing Downey Jr. in the role of Doctor Doom. The choice of Doom as the antagonist — and Downey’s apparent creative involvement in shaping the character’s backstory and costume — suggests Marvel is aiming for nothing less than a reinvention of the hero-villain dynamic that defined the Infinity Saga.

“He’s writing backstory, costume ideas. We were just on the phone with him this morning... He just loves really rich three-dimensional characters,” Joe Russo said. And if Downey Jr.’s return means anything, it’s that Marvel is confident they’ve unlocked a new layer of storytelling for the MCU.

Avengers: Doomsday Casts A Stellar Lineup From Across The MCU

Already loaded with talent, Avengers: Doomsday is shaping up to be the most star-studded Marvel film yet. The recent Thunderbolts* cast reveal gave fans a taste of what’s to come, with Sebastian Stan, Florence Pugh, Wyatt Russell, David Harbour, and Hannah John-Kamen all confirmed to reprise their roles. Add to that the core ensemble from The Fantastic Four: First Steps — Pedro Pascal, Vanessa Kirby, Joseph Quinn, and Ebon Moss-Bachrach — and you’ve got a lineup that spans the entire MCU spectrum.

And this is just the beginning. Feige has teased that more cast additions are on the way, and with Marvel’s track record, it’s only a matter of time before we hear about legacy heroes returning—and perhaps even new ones making their debut. The fact that these Avengers films are being shot in tandem with Secret Wars only heightens the mystery about which characters will survive, evolve, or collide across these multiversal sagas.

From Kang Dynasty To Doomsday — How Marvel Rebooted Its Biggest Battle

What makes the start of filming even more significant is the context behind the project’s evolution. The two Avengers sequels were originally tied to Kang the Conqueror, with Doomsday previously titled Avengers: The Kang Dynasty. But after Marvel cut ties with Jonathan Majors due to legal issues, the studio rewrote the playbook. The villainous role once meant for Kang has now been reimagined around Doctor Doom — and Marvel fans are already theorizing how Downey’s Doom will fit into the multiverse continuum.

Whether Doom is an alternate Tony Stark, a variant from another reality, or something entirely new, Marvel’s willingness to pivot so boldly speaks to the creative freedom they now have in the post-Endgame era. It’s a reminder that the MCU is no longer just about superheroes — it’s about storytelling at its most flexible and ambitious.

What We Hope To See Before May 2026 — And What This Means For Marvel’s Future

With Avengers: Doomsday scheduled for a May 1, 2026 release, fans are already speculating about when the first trailer will drop. Theories suggest a possible teaser release this fall, potentially alongside TRON: Ares or Avatar: Fire and Ash. Marvel’s tight control over spoilers — especially with the Russos planning for potential set-leak contingencies — means we may have to wait a bit longer for an official look.

But one thing is certain: the footage is sure to ignite the fanbase. Whether it’s a glimpse of Doom’s armor, a shot of the Avengers assembling in a brand-new configuration, or a tease of the multiversal chaos that will lead into Secret Wars, Doomsday is poised to be the MCU’s next genre-defining moment.

After six years since Endgame, Marvel isn’t just bringing the Avengers back — they’re reinventing what an Avengers movie can be. And it all starts on April 28.