The movie doesn't change in any way: no big changes in plot, no old characters re-appearing. It's not very thought provoking in that sense. We don't get to see what else can be done with the character of Megatron; we don't even know if he will make an appearance at all. He doesn't seem like a bad guy in this film. The closest thing is his cold dead eyes and broken speech in "Look Who's Back," but I didn't really care for