Glenn Morshower, who has starred in the first three Transformers movies, will be in Transformers 4 AND Transformers 5. Morshower said that he was approached by producer Steven Spielberg after the opening of Transformers The Ride about his involvement in the next two movies. He also stated that Transformers 4 filming will begin this December along with Transformers 5, which probably means that the rumors from a few months ago were true and TF4 and TF5 will be shot back to back. This technique has been done with other movies like the last two Harry Potter movies and two of The Matrix movies. This could also be a hint for director Michael Bay returning for a fifth Transformers movie, especially after his latest interview in which he said that Transformers 4 will probably be his last. Before that interview, he always said that Transformers 4 will be his last.
"After I did the opening ceremonies for the ride, Steven Spielberg
walked up to me and chatted and said 'You know we've got you set to do the
fourth one and probably the fifth one on the heels of that," said on how he was
approached about the new sequels. "So, I guess in December we are on our
way to making 4 and 5."