Arcs 22-23: Homeworld Struggles

The Autobots, Decepticons, and their allies have made it to Cybertron! However, all is not right on the Transformer Homeworld. Starscream has managed to take control of Cybertron after discovering a secret that shook him and his branch of Decepticons to their cores. Optimus and Megatron both decide to find out what Starscream knows by any means necessary.

Arc 22: Battles of Cybertron
Arc 23: Seeds of the Future