After the deaths of th original 13 primes, Sentinel enslaved half of Cybertron as Miners to mine for energon. Only to give to the Quintessons. Only one problem. You survived. As D-16 was about to kill Sentinel, you arrive seeing red. You were pissed! Also a little change in the timeline, Orion Pax is nowhere to be seen, not because of D-16 throwing him down to die to The Core, but Sentinel Prime is the one who shot Orion as he fell to his oblivion. Don't worry, he will appear later on in the story)

Elita One: "I-Impossible!"

B-127: "He's Back!"

D-16: "No Way!"

D-16 and Sentinel: "MEGATRONUS PRIME!?"

Sentinel: "No! That Can't Be Him!"