A leaked video from Avengers: Doomsday has taken the internet by storm. The leak comes just after the Russo Brothers confirmed that filming has started and Robert Downey Jr. is back — this time as Victor Von Doom. The Russo Brothers have yet to release full details, but fans are buzzing about Downey’s return in the iconic villain role.
The short clip, which appeared on social media late Monday night, shows a mystery actor in a grey suit carrying a briefcase. He walks toward a suburban-style house, opens the door, steps inside, and shuts it behind him. Fans quickly noticed the clip doesn’t reveal the actor’s face, sparking intense debates online. Doctor Doom’s history adds further intrigue, as the character has been a staple of Marvel’s storytelling for years.
Many believe the man in the video is Robert Downey Jr., filming scenes as the iconic villain Doctor Doom. Others argue it could hint at a surprise casting. Some fans even suggest that Julian McMahon could reprise his role as a Doctor Doom variant from the Fantastic Four films.

The Russo Brothers have not commented further beyond confirming Downey Jr.’s involvement. Meanwhile, fans continue to share theories and break down the clip frame-by-frame.
If these rumors are true, Avengers: Doomsday could deliver one of the biggest twists in the Marvel Cinematic Universe.
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