The Primes synopsis: Two Optimus Primes come face-to-face, with one explaining the sequence of events that led to the demise of his universe and the dangerous scope of his Megatron's thirst for power and conquest. Meanwhile, Megatronin assembles a squad as he prepares to lead his first energon raid, much to the dismay of Starscream. Following an unexpected clash between the Autobots and Decepticons, which causes Megatronin's memory circuits to reinitialize, and with him standing on the cusp of victory over an old foe, he suddenly and shockingly call off the attack. Only he knows the reason why and the massive chaos behind the storm that is to come.
https://www.youtube.com/watch?v=i6KtK0ki3zM