Marvel Avengers Doomsday Rumored Storyline Leaked: Here’s What Happens in Act One

July 10, 2025: A recent rumored plot leak for Marvel Avengers Doomsday has surfaced, unveiling potential details about the movie’s first act.

According to the leak, the storyline begins with Shuri discovering the imminent threat of universe collisions, known as Incursions. She alerts Captain America, Wong, Bruce Banner, and Captain Marvel about the crisis. Simultaneously, the Fantastic Four arrive on Earth-616, greeted by the New Avengers. They are searching for Franklin Richards, who has been kidnapped by Doctor Doom. Galactus is mentioned, and Bucky seeks out Sam Wilson for assistance. Shuri then assembles a team, including Captain America, Wong, Hulk, Captain Marvel, Thor, Bucky, Yelena Belova, M’Baku, Namor, and the Fantastic Four. Together, they deduce that the encroaching universe is the one where Monica Rambeau is currently stranded.

They also learn that Doctor Doom and Franklin are on this same world—the X-Men Universe. The heroes now face a three-part mission: prevent the Incursion, rescue Monica and Franklin, and confront Doom. America Chavez is enlisted by Wong to open a portal to this alternate Earth, though her involvement seems limited to that task. Some heroes travel to the other reality while others stay behind. Initially, a battle erupts between the heroes from both universes, but tensions ease as they realize a greater force is at play. The true scope of the conflict begins to emerge, with Doctor Doom, the TVA, and Loki poised to shape the events that follow.

Avengers: Doomsday is scheduled for release on December 18, 2026, and is expected to be a two-part epic that follows in the footsteps of previous major team-up events in the MCU.

Please note that these details are based on a rumored plot leak and have not been officially confirmed by Marvel Studios.