Megatron

Resurrected (using data on Rhinox’s recovery of Primal’s spark in season 2 BW, found on the Axalon) and rebuilt on Earth by Tradewind and a group of collaborators. Who these collaborators were is unknown, as Megatron killed them shortly after coming back online. Plans to use Earth as a staging ground for the reconquest of Cybertron.

Character design: Predicon/Vehicon, purple. Robot: Back to the TM2 look, mostly, but larger (about the size of Dragon Megatron) and without organic components. Right arm is a Tankor-like cannon, with four barrel extensions also working as fingers. Alt mode: Jet powered flying tank. As you can see, he's sort of a hybrid between Tankor, Jetstorm, and a few of his previous bodies. The diamond thing in his chest allows his spark to suck in and devour other sparks.