It'd have to have a homosexual Bane as the villain, giving a whole new meaning to the term "Breaking The Bat"persopolis said:"Pinguing! your evil scheme stops here! On an unrelated note: is that an umbrella you're holding there or are you just happy to see me?"
Yes, gay batman indeed sounds interesting, but I think i'd still be going for "the dark knight". Think about the gaps your imagination could fill in with a title like "Gay Batman".