So from what we know from trailers and leaked ending speech Optimus lives and he was built. Maybe the only thing that can defeat him as a villain is himself thus who ever made the transformers makes nemesis prime/ scourge to hunt down Optimus. It would be a cool nod to repaints and a way to bring in nemesis prime character. Tf 5 Rise of the repaints! But it all idea not legit so don't go crazy I didn't see the movie yet. If anybody else has ideas please post them. It all for fun conversation.