Avengers: Endgame’s New Post-Credits Scene Will Retcon Iron Man Into Doctor Doom – Theory Explained
Marvel
The hammering sound that closed Avengers: Endgame may be retconned from Tony Stark building Iron Man to Doctor Doom forging his mask — same audio, entirely new meaning.
Retcon TheoryNarrative Framing EffectCanonical RevisionAudience Expectation Management
Theory Briefing
- The iconic post-credits hammering sound from Endgame was originally tied to Tony Stark building his first Iron Man suit in captivity.
- A fan theory proposes Marvel will recontextualize that same audio as Doctor Doom forging his scarred-face mask, using the re-release to plant the twist.
- In Marvel Comics, Doom designed and forged his own mask after a lab accident permanently scarred his face — a detail that makes the audio swap plausible.
- Fans are divided because Endgame's original ending was widely praised as a deliberate, poetic close to the Infinity Saga era.
- The retcon wouldn't need to show Downey Jr.'s face — just the mask and silhouette — leaving his Doctor Doom reveal for Avengers: Doomsday itself.