During the war between the Legions of Super-Heroes and the Legion of Super-Villains, Prime battles several opponents with whom he has a history. First, the immortal Sodam Yat (the last Guardian of the Universe) is persuaded to end his self-imposed retirement on Oa to battle Superboy-Prime. Then Bart Allen returns from the Speed Force, wearing the Kid Flash uniform that he had not worn since fighting Prime in "Infinite Crisis". Soon after, Conner Kent (Superboy) enters the battle, his corpse dug up by Starman in the present and placed in a Kryptonian restoration chamber for the past 1000 years. The resurrections of Kid Flash and Superboy are part of a master contingency plan devised long before by Brainiac 5, who was forewarned of Superboy-Prime by one of Dream Girl's prophecies.