President Lex Luthor rallies the super-heroes of Earth, the U.S. military, and other countries, such as Pokolistan, together for the coming battle, but decides that Superman alone does not have enough power to lead the kind of strike force required. He thus arranges for Doomsday to be released from captivity, 'anti-hero' telepath Manchester Black temporarily 'reprogramming' Doomsday's mind so that his traditional hatred for Superman is briefly transferred to the Imperiex probes. Superman and Doomsday fight the probes and manage to destroy several until Imperiex Prime himself is finally drawn to them. Doomsday is outmatched and vaporized, only his skeleton remaining, though Darkseid saves Superman from a similar fate. Thanks to the sacrifices of Strange Visitor and General Rock, Earth's forces manage to crack Imperiex's armor, intending for Darkseid to use Boom tubes to transfer Imperiex's energies back to the galaxies he had destroyed to prevent them from triggering a new big bang. However, Brainiac-13 appears on the battleground with his Warworld, absorbing the Imperiex energies into it and himself and vowing to use them to rule everything. Superman dives into the sun to acquire a sufficient power boost to oppose Brainiac, but when it is then discovered that Warworld cannot be destroyed without releasing Imperiex and triggering another Big Bang, he has the Martian Manhunter form a telepathic link with other combatants to make a last-minute plan.