Avengers: Doomsday Teaser Hints at Major Fantastic Four Crossover

The Marvel fandom was sent into a frenzy when the Russo Brothers posted a cryptic image online, teasing elements from Avengers: Doomsday. The image, seemingly a zoomed-in view of scribbled notes on a blackboard, immediately reminded fans of scenes from The Fantastic Four: First Steps, where Pedro Pascal’s Reed Richards was often seen working on similar chalk-covered equations. That visual connection reignited speculation that the Fantastic Four will play a major role in Doomsday. Adding fuel to the theory is the emotional finale of First Steps, where Robert Downey Jr.’s Doctor Doom is seen holding Reed and Sue's son, hinting at a storyline too big to end there.

Social Media Unpacks the Russo Clue

Reddit and Instagram quickly became hotbeds for fan analysis. Comments suggested the blackboard in the Russo Brothers’ post is either Reed Richards' scientific scribbling or a layered hint at the multiverse crisis unfolding in the MCU. Some fans believe the chalkboard holds the key to the ‘bridge’ between universes that Reed may be building. Others see potential connections to Moon Knight or even the Young Avengers. While the true meaning remains unclear, the fandom agrees this is not a random tease. It’s a deliberate breadcrumb, possibly confirming the Fantastic Four’s central role in Avengers: Doomsday.

Leaks Confirm Crossovers and Familiar Faces

In July, a leaked photo from the Doomsday set offered more insight. The image featured Ebon Moss-Bachrach as The Thing, Wyatt Russell’s US Agent, and Danny Ramirez as the new Falcon standing in what appears to be a spaceship cockpit. The design closely resembles the spacecraft shown in the Thunderbolts post-credit scene, believed to belong to the Fantastic Four. The most intriguing part of the leak was the presence of Black Panther’s suit, specifically a shot of the leg armor, heavily implying Letitia Wright’s Shuri is involved. This blend of characters from different MCU corners suggests that Avengers: Doomsday may be the biggest ensemble crossover since Endgame.

Plot Rumors: Doom, Incursions, and a Multiverse in Peril

Plot details remain tightly guarded, but insiders and scoopers have pieced together a likely direction. Shuri reportedly discovers the first signs of Incursions, the merging of universes, and warns heroes like Sam Wilson, Wong, Bruce Banner, and Captain Marvel. Simultaneously, the Fantastic Four officially arrive on Earth-616, with Reed Richards revealing that Doctor Doom has kidnapped his son Franklin. Galactus, previously shown trying to capture Franklin for his cosmic potential in First Steps, is confirmed dead. This sets the stage for a massive confrontation. Reed’s personal stakes, Doom’s unpredictable motives, and the rising multiversal threat force the New Avengers and Thunderbolts into uncharted territory. With Bucky Barnes seeking Sam’s help, the battle lines are clearly being drawn, but the outcome remains uncertain.

Avengers: Doomsday is set for release on December 18, 2026, and marks Robert Downey Jr.’s full return to the MCU-not as Iron Man, but as the sinister Victor von Doom. With high expectations, multiverse stakes, and a growing ensemble of heroes and villains, Doomsday is shaping up to be Marvel’s most ambitious chapter yet.