The trailer, shown at the end of the special showings, is shaky-cam footage. That means it was taken via cell phone camera, and it’s dark and shaky. Still, it’s clear is about the Avengers, particularly with the “Some Assembly Required” tagline.

In addition to the trailer leak, it was confirmed on Monday that “Captain America” will open first in Comic-Con in San Diego. Convention-goers will be the first public viewers to be able to see the film, beginning at noon PST on Thursday, July 21st, one day ahead of its U.S. opening.

Additionally, those early ticketholders will receive RealD® 3D Collector’s Custom red, white and blue “Captain America: The First Avenger” glasses and a limited edition poster designed exclusively for the fans. The showtimes for the special Comic-Con screenings are: 12:00 P.M., 12:45 P.M., 2:45 P.M., 3:30 P.M., 5:30 P.M., 6:15 P.M., 8:15 P.M., 9:00 P.M., 11:00 P.M. and 11:45 P.M. The movie will play exclusively at the United Artists Horton Plaza, with Captain America-themed events throughout the day.

Additionally, to help kick-off the movie, Paramount and Marvel will host an exclusive free fan screening at 10 A.M. with the movie’s star Chris Evans (Steve Rogers / Captain America) on-hand to intro