Plot: It's been 4 years after Transformers 3, and the Autobots are now involved in human activities (helping old people across the street, racing in Daytona, etc). The humans have reacted in a relatively good way. However, the peace is interrupted when a ancient Decepticon (Cyclonus) shows up, causing ancient Autobots (The Dinobots) return to battle Cyclonus.
Optimus Prime: I would like Optimus Prime to still be leader of the Autobots, of course. Optimus Prime should probably keep the same head, but have a different body.