“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.

What we know about Avengers: Doomsday has been limited, but the blockbuster is definitely coming together behind the scenes. Marvel's live stream revealed most of its cast, which obviously includes Robert Downey Jr.'s return and debut as Doctor Doom. A photo from The Russos' Instagram showed that they're seemingly on set, check it out below: