Optimus Prime, sometimes known as Nemesis Prime, is one of the main protagonists (alongside Sam Witwicky and Cade Yeager) of the live-action Transformers Cinematic Universe. Originally a peaceful Cybertronian scientist and the very last Prime of the Dynasty, Optimus and his team of scientists were studying the mysterious Allspark until they were betrayed by their security unit, the Decepticons, and his twin brother who is now corrupted power hungry leader, Megatron. Naming his squad of scientists as the Autobots, he used his team to fight the tyrannical Decepticons in order to stop them from getting the Allspark's awesome power. He is based off his original incarnation with the same name.