“Hyper-Tension! Part One: Big Bang Theory!”
At the JLA Watchtower, energy from a wounded Superboy's jacket gives Wonder Woman visions of alternate realities. Superboy gasps, "Blackness coming...This Earth next...", and dies as Superboy enters! Project Cadmus investigates and finds the 2 Superboys are IDENTICAL and the jacket uses New Gods technology. The New Gods' Gadget Guru determines the jacket is DNA-specific to Superboy and may transcend Hypertime. To enter Hypertime, Superboy is strapped to an atomic missile, is shot into space, and activates the bomb. Awakening in the Batcave, he meets an alternate Batman and Superboy-Robin!