According to a new interview with the LA Times, director Michael Bay is planning another Transformers film, because apparently, the world really needs one more.
No, none of them, actually. According to Bay, the fourth film will feature a completely new cast, and even redesigned robots. He says that, as this film will be his last in the franchise he's setting it all up "for the next guy," whoever that may be. So, while Bay may stop creating them, we'll most likely never see the end of the Transformer films. Good to know.