Unicron's body is inactive and badly damaged from his previous battle. Ten years after Galvatron's sacrifice a former victim of Unicron chooses to strike. Within Unicron's shell, the Spark of Alpha Q, ruler of Planet Q, which Unicron had consumed in the past, still exists. From Unicron's body, he creates the Terrorcons to gather Energon, which he intends to use to regenerate all the worlds Unicron devoured. However, Megatron's corpse and Spark remain within Unicron, and slowly siphon off some of the gathered Energon, allowing him to be reborn in a new body through the unintentional actions of Scorponok. Hunted by Megatron, Alpha-Q then jettisons Unicron's head and escapes in it. Megatron takes over Unicron's body and continues to gather Energon in order to rebuild Unicron to use as a weapon. A joint attack by Alpha-Q, the Autobots, and their human allies see all of Earth's Energon channeled into Unicron's head, which Alpha-Q then rams into Unicron's body. The positively charged Energon of Earth reacts with the negatively charged Energon running through Unicron. It tears open a fissure in reality leading to a new area of space where planets Unicron consumed are recreated and sustained through the Energon radiated from Unicron's head, which is now a glowing red sun.