This video presents a comprehensive fan theory arguing that the Avengers' time heist in Avengers: Endgame is the direct cause of the multiversal collapse anticipated in Avengers: Doomsday. The central premise is that the events of the Loki series occurred concurrently with Endgame, meaning the alternate timelines created by the Avengers were never pruned. Instead, they were allowed to branch infinitely, creating countless opportunities for universe-destroying incursions. The video meticulously breaks down how Captain America's "careless" return of the Infinity Stones—often without their original containment units—catastrophically alters each timeline he visits. The theory culminates in the proposed origin for a new Doctor Doom: a version of Tony Stark from a 1974 reality where Steve Rogers returns the raw Tesseract to a Hydra-infiltrated S.H.I.E.L.D., leading to Tony being raised by Hydra. This version of Stark, obsessed with absolute order, gains cosmic awareness of the multiversal chaos caused by the Avengers and becomes the villainous Doctor Doom, seeking to impose his will by force.
How Endgame Created Doctor Doom: A Multiversal Theory
0:00:01 The Core Premise: The video argues that the Avengers' selfish actions in Endgame, specifically Steve Rogers' mission to return the Infinity Stones, are directly responsible for creating the multiversal chaos and incursions that will define Avengers: Doomsday.
0:01:31 The Loki Connection is Key: The theory hinges on the idea that the events of the Loki TV series, where the sacred timeline is broken and infinite branches are allowed to grow, happen instantaneously during Endgame. This means the alternate realities the Avengers created were not erased as planned, but instead grew exponentially, increasing the risk of incursions.
0:05:30 Chaos in 2013 Asgard: Steve returns the Aether as a solid stone, not its liquid form. This could prevent Frigga's death, meaning Loki never redeems himself and remains a villain. Asgard avoids Ragnarok, but this timeline's heroes are far weaker and likely lose to Thanos, leading to that universe's destruction.
0:07:50 A Vulnerable 2012 New York: Because Loki stole the Tesseract, Steve cannot return it, leaving this timeline vulnerable to dark forces, just as the Ancient One warned. Furthermore, returning the Mind Stone as a raw artifact and altering the Ancient One's knowledge could set this reality's Doctor Strange on a path to becoming a villain like Strange Supreme.
0:10:41 The Doomed 2014 Universe: With Thanos, Gamora, and Nebula from this timeline gone, the Guardians of the Galaxy never form. This allows Ego to find Star-Lord unopposed and succeed with his universal "expansion," killing everyone. On Vormir, Steve meets the Red Skull, who may have been freed from his curse and could have warned Steve about the damage he was causing.
0:12:09 The Birth of Doctor Doom: The theory proposes that the 1974 timeline is where Doctor Doom is created. Steve returns the raw, uncontained Tesseract to a S.H.I.E.L.D. base that is secretly controlled by Hydra. With access to this immense power, Hydra rises decades earlier.
0:12:47 A Hydra-Raised Tony Stark: In this altered timeline, Howard Stark is assassinated sooner, and his son, Tony Stark, is raised as a ward of the Hydra empire. Without the influence of the Avengers or Pepper Potts, this Tony grows up unloved and indoctrinated with a belief in absolute order.
0:13:24 The Ultimate Villain's Mission: This version of Tony Stark eventually creates his own armor and survives his timeline's version of the snap. The experience gives him cosmic awareness, allowing him to see the entire chaotic, branching multiverse and the incursions threatening it—all caused by the "main" Avengers. Believing order must be imposed, he becomes Doctor Doom, aiming to consolidate all realities into a single, safe "Battleworld" under his control.