A resurrected Unicron has taken over the now-lifeless body of Megatron to seek vengeance on the Autobots and ultimately, the destruction of Cybertron.

After a battle in a power plant, Ben notices something strange is happening with the omnitrix, but doesn’t tell anyone. Tetrax arrives, and tells them the omnitrix is broadcasting a…

A resurrected Unicron has taken over the now-lifeless body of Megatron to seek vengeance on the Autobots and ultimately, the destruction of Cybertron.