Anybody else wondering about those debris floating Cybertron's space? What if it was Unicron? In most continuities Autobots and Decepticons wouldn't have heard of Unicron. Here we have the Blood of Unicron aka Dark Energon. Starscream refers to ancient texts referring to the effects of Dark Energon. What if Unicron here was destroyed earlier, probably by Primus and the Thirteen minus the Fallen. (Since Hasbro wants shoe horn them in Prime continuity.) Dark Energon are just his remains scattered.