TFA Galvatron

Now, I know what you're thinking.

"WTF? Sentinel's Galvy? How, exactly?"

After the end of Sentinel's short reign as Magnus, Optimus Prime humbly gave the hammer to the so-called "Chosen One" Rodimus Prime, and Optimus stood as his mentor and guard. Meanwhile, Megatron adopted his Marauder form courtesy of Blackarachnia, but was swiftly defeated by Optimus Prime, Prime's Powermaster Armor, and a legion of soliders from the planet of Paradron when Megatron attempted to acquire control of the Autobot colony. Megatron, ravaged and destroyed beyond repair, began to drift into space. Meanwhile, Sentinel began having thoughts of revenge against the bot who toppled his regime, along with visions of a planet-eating entity in stasis, similar to the ones Autobot assassin Strafe began to have back in the dawn of the Great War, before he went on a murderous rampage. All of a sudden Sentinel went and engaged Optimus in combat, but Optimus did not come out alive, as Sentinel ripped the spark out of his chest. In the fight, Sentinel recieved a destroyed optic, and a scar across his face. When the Autobot guard came to apprehend Sentinel, he was sent to Garrus-9, but escaped the shuttle on, and began to drift into the vaccum of space, until he was collected by the planet eating entity he dreamed so much amount. Inside the core of the beast, he was transformed into a bigger, stronger, psychotic, more destructive new body, for the long deceased leader of the Decepticons.