Over on Earth-32, DC asked an interesting question. What would happen if Abin Sur had never given his the ring to Hal Jordon? What if in fact he had crash landed in Gotham and gave the ring to Bruce Wayne? That was the premise of Batman: In Darkest Knight. In the story, Bruce is given the ring after a botched first attempt at crime fighting and is inducted into the Green Lantern Corp. Also in the story, the Guardians of the Universe question Bruce's role as a Lantern, he gets beat up by Sinestro a bunch before letting him escape and both Commissioner Gordon and Alfred die. Moral of the story? Batman doesn't make a good Green Lantern.