Did David Harbour Just Spoil Tony Stark's 'Avengers: Doomsday' Return?
David Harbour may have revealed a major Avengers: Doomsday spoiler after delivering a cryptic line suggesting Tony Stark could return.
Marvel Studios has once again left fans speculating after actor David Harbour seemingly teed up a major reveal from Avengers: Doomsday, according to The Guardian. Repeating his role as Alexei Shostakov, or Red Guardian, Harbour, when asked to deliver a line out of context, adopted the villain's Russian accent and declared, "You are... Tony Stark." This caused consternation, as Robert Downey Jr. is set to return to the Marvel Cinematic Universe as Victor von Doom, not Tony Stark or Iron Man.
The most plausible explanation is that Harbour was being deliberately humorous or trolling fans. Marvel Studios has gone to great lengths to keep its major spoilers under wraps. The latest trailer portrays Downey's character as Victor von Doom, offering no hints that the man beneath the mask is anyone other than Downey. However, this has not stopped fans from searching for clues.
Some viewers have noted differences between Doom's costume in the trailer and previous appearances, while others have pointed out that a close-up of Doom's face in the trailer appears to show blue eyes instead of Downey's brown. These details have fueled theories that Doomsday could feature multiple versions of the character, with Downey's Doom potentially being replaced or killed by another incarnation.
One theory even links the mystery to Cillian Murphy, a popular choice to play Doctor Doom, who has blue eyes. However, there is no confirmation that Murphy is involved in the film. On Reddit, fans have speculated that Red Guardian could mistake Doom for Tony Stark, or that Doom could take over Stark's body, echoing the multiverse concepts from Doctor Strange in the Multiverse of Madness.
Others suspect that Marvel may have intentionally allowed the line to be spoken, as it does not reveal the film's biggest secret. Regardless, the comment has added another layer of mystery to Avengers: Doomsday, as the studio still has to explain why Downey's Doom and Tony Stark look identical while keeping the real answer hidden until the film's release on December 18, 2026.
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