Megatron has already been resurrected once. It doesn't matter if you resurrect him and rename him to be Galvatron. The fact is that Megatron died in the first one, got resurrected in the 2nd one and had a new form. He looked different in robot mode and had 2 alt modes. So essentially he is physically a different character but he's still Megatron. And then in the 3rd one, once again, you give him a new mode. So some fans want Megatron to come back and as Galvatron??????? Are you serious?? So.....really......Megatron never really ever dies in these movies? We just gotta keep on bringing him back? To be completely honest, I think bringing back to life the main dead Decepticons is an insult to the 3rd movie. Think about it, let's say Michael Bay is not coming back for a fourth. And then they get a new director and then he likes the idea of resurrecting Megatron, Starscream, Soundwave and Shockwave. Wouldn't that be an insult to Michael Bay for making it a point to end the movie on a high note? Also, do you remember Aliens and Alien 3? People said Alien 3 was an insult to James Cameron's masterpiece, Aliens because the characters that were meant to survive, ended up dying before Alien 3 even rolled their opening credits. They just killed off their characters for the convenience of the script/story. So in the case of Transformers 4 (if it were to happen), if they brought back the main villains because Unicron resurrected them all, its the exact same case of the Aliens / Alien 3 syndrome except instead of killing of the characters that were meant to survive in the previous movie, you revive the characters that were meant to stay dead! So anyways, that's how I feel. I know that some fans don't care about these things and the just want to see it happen but at the same time, you gotta respect the previous movie and the original director's vision. That is why fans come up with the phrase "the sequel ruined the original." As much as the fans want their favorite villains back, if it really did happen, I truly believe there will be something about it that they won't like because the 3rd one got right by killing them off. And then they'll say the 4th one wasn't good because they should've introduced new villains. Sheeesh, how about instead of trial and error.....how about we just get it right the first time and add all new characters so we don't have to worry about such things? Reboot please.