The sequel to 2009's G.I. Joe: The Rise of Cobra features several new recruits, including director Jon M. Chu (Step Up 2) and stars Dwayne ''The Rock'' Johnson and Bruce Willis. ''The Cobra command is trying to take over the world,'' says Johnson. ''I get Bruce Willis and we start kicking ass.'' How much Rise of Cobra star Channing Tatum participates in the rump booting is unclear. The freshly minted A-lister has little screen time in the movie's trailer, which hints at a terrible tragedy befalling the Joe team. Would Mr. The Rock care to comment on Tatum's part in Retaliation? ''Um, yeah,'' Johnson laughs coyly. ''He's in the film and he reprises his role!''