Home to the superteam Justice 9, whose leader, Optiman, was slaughtered by the rampaging "Super-Doomsday" of Earth 45, before members Red Racer and Flashlight were brought to the House of Heroes to aid in the battle against the Gentry. The manipulations of The Gentry caused a zombified Optiman to appear and attack his teammates, before they joined the other heroes of the Multiverse to end the crisis.
Justice 9:
Optiman
Iron Knight
War-Woman
Mer-Man
Flashlight
Red Racer
Cyberion
Bowboy
Blackbird