Marvel Unveils Two 'Avengers: Age of Ultron' Concept Art Posters

As if date announcements and Ant-Man posters weren't enough, Marvel Studios unveiled two Avengers: Age of Ultron concept art posters on Wednesday night. The posters feature Robert Downey Jr.'s Iron Man and Elizabeth Olsen's Scarlet Witch.

Both posters will be available at Marvel's Comic-Con booth. Good luck getting your hands on one, though, as the studio says, "Once these two character posters are gone, then they're gone."