Avengers: Doomsday Leak Perfectly Connects to Endgame

The Return of the Avengers

The Marvel Cinematic Universe (MCU) has been missing the presence of the full Avengers team since the release of "Avengers: Endgame." While there have been other crossovers featuring smaller groups of heroes, the absence of the main Avengers lineup has left a void. This gap is set to be filled with the upcoming film "Avengers: Doomsday," which is scheduled to hit theaters in December 2026 and will also mark the beginning of the conclusion of "The Multiverse Saga."

Production on "Doomsday" is currently underway, and while Marvel is working to keep the plot details under wraps, various rumors have already started circulating about what fans can expect. One such rumor suggests that a credit scene from "The Fantastic Four: First Steps" might have hinted at a major plot point related to "Doomsday." However, this particular detail doesn't reveal the entire storyline.

A well-known leaker recently shared a significant plot detail that connects "Doomsday" back to "Endgame," suggesting the story will pick up right where the previous Avengers movie left off. Although this information is not yet confirmed, another insider provided some additional details that could support the link between these two films.

For those who want to avoid any spoilers, especially regarding "Avengers: Doomsday" and "Avengers: Secret Wars," it's advisable to steer clear of the following content.

The Fate of Steve Rogers

One of the most debated topics at the end of "Avengers: Endgame" is the fate of Steve Rogers (Chris Evans). After completing his journey as Captain America by marrying Peggy Carter (Hayley Atwell), Steve chose to live out the rest of his life with her. Marvel officially explained that Steve created a new reality when he went back in time to be with Peggy, but some fans believe he traveled to the main MCU universe, Earth-616.

Since 2019, many fans have been curious about what Steve Rogers did after "Endgame," but Marvel has never provided a follow-up story. This mystery is now being addressed through recent leaks.

In mid-August 2025, a well-known leaker named MyTimeToShineHello shared a shocking spoiler on X, as reported by Redditors. According to this leak, Doctor Doom (Robert Downey Jr.) wants Steve Rogers dead because he caused incursions by traveling back to the past to find a different version of Peggy.

From "Endgame" and the "Loki" TV show, we know that changing the past isn’t possible—instead, it creates new timelines. Before Loki became the guardian of the Time Variance Authority (TVA), the organization often destroyed these new timelines. It’s possible that Steve Rogers’ decision to marry Peggy was something He Who Remains accepted before his death, or perhaps that version of Kang never had the chance to deal with Rogers.

If the above plot detail is accurate, fans may see the former Captain America return in future Avengers movies.

Chris Evans' Possible Return

For years, fans have speculated that Chris Evans would return as Captain America, just as Robert Downey Jr. would reprise his role as Iron Man. Marvel confirmed RDJ’s involvement in "Doomsday" and "Secret Wars," but instead of playing Iron Man, he will take on the role of Doctor Doom. However, Marvel has yet to confirm Evans’ return.

Even if the previous rumor is true, it’s likely that Marvel will keep this surprise for the film’s premiere. Another report adds more weight to the connection between "Doomsday" and "Endgame." A well-connected Marvel insider named Alex Perez answered questions from MCU fans on The Cosmic Circus. This Q&A session focused on "Doomsday," and Perez provided several insights into the film.

Perez revealed that Robert Downey Jr.’s Doctor Doom is the protagonist of the film, much like Josh Brolin’s Thanos was in "Avengers: Infinity War." According to Perez, Doom’s motivations revolve around the fate of the multiverse: “He sees the incursions happening as a danger to the Multiverse and wants to stop them using a young Franklin Richards. He sees himself as the hero in this story and will do whatever it takes to stay on top.”

This raises the question: will this involve finding the source of the incursions and eliminating them? If so, then the earlier plot detail about Steve Rogers holds true. Additionally, Perez mentioned that both Chris Evans and Hayley Atwell will appear in the upcoming Avengers crossover. He described their roles as “end of the world, forced out of retirement, a hero's job is never done.” This strongly suggests that both actors will be in "Doomsday," further supporting the earlier rumor.