Grimlock moved like a T-Rex, but I don't get his horns/ears. Swoop makes sense for the two-headed dragon, except for the two heads; unless of course, its a Predicon. I'm under the impression that the canon that shots Prime was Galvatron, and the silver bot that destroyed the red car was Cyclous. In the opening scene, it looks like Unicron, albeit slightly smaller, was emerging from the smoke. Hound has been confirmed to be in the movie.