Robert Downey Jr. teased a “big announcement” in 8 days along with his Iron Man character poster for Avengers: Age of Ultron last week via Twitter.

What will it be?

Here are four theories for your consideration:

Iron Man/Spider-Man

RDJ is Marvel’s biggest box-office champ so why not have him help Spidey start swinging again. RDJ joined Captain America: Civil War. When Spidey joined Avengers in the Brian Bendis run, Peter Parker found a mentor in Tony Stark. I’d love to see Parker and Stark work together in a team-up film. It’s possible RDJ will announce he will appear in the Marvel/Sony Spider-Man film following Civil War. Continue reading ROBERT DOWNEY JR’s Big Announcement: Four Theories