Returning to a wholly animated product, the robot franchise hatches an unusually smart and well-voiced prequel helmed by "Toy Story 4" Oscar winner Josh Cooley.

That’s where the characters find themselves in “Transformers One,” the animated origin story of Optimus Prime and Megatron. Up to this point in the movie, the film’s leads have not been in the possession of the cogs needed to transform.

Transformers One is one of the best Transformers movies in decades, so could this be a new start for the franchise? Here's the film's ending, explained.

Transformers One explores Optimus Prime and Megatron's origins, and the movie's ending sets up the future for Cybertron, Autobots, and Decepticons.

Technically a prequel, this film will take viewers back to the origins of Optimus Prime and Megatron. Have you heard? Before they were enemies, they were once the best of friends. Chris Hemsworth stars as the voice of Optimus Prime,