Filming on "Avengers: Doomsday" has officially begun. Anthony and Joe Russo let the world know through social media that principal photography on the next big Marvel event film had started. The pair posted a picture of Robert Downey Jr.'s actor's chair from the set, reading simply "Victor Von Doom". You can see the post yourself below.

New Avengers Doomsday set leaks reveal more about an X-Men scene Marvel Studios is filming right now. New details might reveal how Captain Marvel and the New Avengers team come in contact with the X-Men in their universe and then come in contact with Doctor Doom in Avengers Doomsday.