Nikki Finke at Deadline has the exclusive: The sequel G.I. Joe: Retaliation was supposed to come out this summer on June 29th. But I’ve learned that Paramount is moving the movie nine months to March 29, 2013, to add 3D. “We’re going to do a conscientious 3D job because we’ve seen how it can better box office internationally,” one of the studio execs just told me. “Jim Cameron did all of Titanic‘s 3D in post — and look how well that movie turned out.” Good luck with that.