Two godly brothers who personify the DC and Marvel Universes become aware of the other\'s existence, and challenge one another to a series of duels involving each universe\'s respective superheroes. The losing universe would cease to exist. The story had an "out of universe" component in that the outcomes of primary battles were determined by readers voting
Aquaman (DC) vs. Namor (Marvel). Aquaman wins by summoning a whale to leap out of the water and land on Namor. Since Namor is pinned and unable to move, he is declared the loser.
Elektra (Marvel) vs. Catwoman (DC). Elektra won by cutting off Catwoman\'s whip as she hung from a girder on a building under construction, but Catwoman survived by falling into a dumpster filled with sand.
Flash (DC) vs. Quicksilver (Marvel). The Flash wins using superior speed.
Robin (DC) vs. Jubilee (Marvel). Robin won by using his cape as a decoy and then tying up Jubilee.
Silver Surfer (Marvel) vs. Green Lantern (DC). Silver Surfer won when both collided with each other and released a huge explosion which knocked out Green Lantern but left Silver Surfer unfazed.
Thor (Marvel) vs. Captain Marvel (DC). Thor won when Captain Marvel was forced to change back to his alter ego Billy. Billy tried to change back, but Thor used Mjolnir to intercept the lightning-bolt that would have transformed him back to normal, the resulting impact knocking Billy out and sending Thor\'s hammer flying off.
Superman (DC) vs. Hulk (Marvel). After exchanging punches and a burst of heat-vision, Superman wins eventually.
Spider-Man (Marvel) vs. Superboy (DC). With the advantage of his spider-sense, Spider-Man wins by tying up Superboy with impact webbing and electrocuting him with high voltage.
Batman (DC) vs. Captain America (Marvel). The match ends in uncertainty—though both are evenly matched after hours of combat, a sudden flushing of the sewer knocks Cap off balance as Batman manages to strike him with a Batarang. Batman rescues Cap from certain death via drowning, but Cap\'s unconsciousness from nearly drowning causes him to lose.
Wolverine (Marvel) vs. Lobo (DC). Wolverine beats Lobo in a brutal barfight which was largely off panel.
Storm (Marvel) vs. Wonder Woman (DC). After Diana drops Thor\'s hammer in order to allow the fight to happen as it was intended, Storm wins the battle after repeatedly hitting Diana with her lightning after a brief melee encounter.