Briefly: Shane Black‘s Iron Man 3 will debut its first trailer online at 12:01 a.m. PST October 23. The first film of Marvel’s Cinematic Universe Phase Two is currently filming in Florida and premiered some early footage at San Diego Comic-Con. Starring Robert Downey Jr., Gwyneth Paltrow, Don Cheadle, Jon Favreau, Ben Kingsley, Guy Pearce, James Badge Dale, Ashley Hamilton and Rebecca Hall, Iron Man 3 opens May 3, 2013. We’ll have the trailer as soon as it’s online. Thanks to E! Online for the info.