One of the 52 know universes known from the Orrery of worlds, earth-36 is defended by Justice-9, a superteam composed by Optiman, Iron Knight, War-Woman, Red Racer, Flashlight, Cyberion, Mer-Man, BowBoy and Blackbird.
Their leader Optiman was one of the supermen recruited by Captain Marvel from earth 5 in Final Crisis and was apparently killed by Superdoomsday of earth-45. However Optiman eventually returned to life thans to a mentioned Black lens, probably related to Flashlight powers.
This world seems inspired in characters from Big Bang Comics, who were also analogs to DC comics characters. Many of them present a retro narrative homaging the comics of the DC Silver Age.