If you go see Captain America: Civil War in IMAX at AMC theaters for the first three Sundays of release, you can collect some special limited edition posters.
The posters were revealed by the official IMAX twitter account, and will be given away, one each on 5/8, 5/15, and 5/22, the first three Sundays after Civil War hits theaters on May 6, 2016.
The posters are interesting, with Captain America at the forefront of one, flanked by Winter Soldier and Scarlet Witch, and Iron Man the obvious central focus of another, with Black Panther and War Machine behind him. The third has Black Widow as the main character, with Hawkeye, Falcon, and Vision in back - interesting since she hasn't helmed a film of her own, and perhaps in some response to the "Trinity" set up by DC/WB for their films, putting a female character in a more prominent position.
IMAX has not yet announced which posters will be given out which day, but says that information will come ahead of the giveaways. Check out the full size posters in the gallery.