“Day One…” the Russo Brothers wrote on Instagram with a photo of a chair that reads, “Victor Von Doom.” The chair is in the spirit of the Doomsday casting announcement, which was also done by showing the actors’ names on a chair. The chair of Victor Von Doom belongs to Robert Downey Jr., who will play Doctor Doom in the next two Avengers movies.

The Russo brothers have shared the first behind-the-scenes look at Avengers: Doomsday to mark the start of filming – and it's a familiar sight.

It’s officially Doomsday… at least on the set of the film. Marvel Studios has started production on Avengers: Doomsday , and the Russo Brothers have shared a photo from the set, and it all starts with Doctor Doom.