 During his captivity, Nightwing is imprisoned in a containment unit built to hold Doomsday, with his heart monitored to set off a bomb should he attempt to escape.The alliance of Batman, Lex Luthor, Catwoman, Captain Cold, Bizarro, Sinestro, Black Manta and Black Adam break into the fallen Watchtower in order to free him but also to sabotage the Syndicate.When they are detected, the bomb is triggered to detonate in minutes.