Kirk Langstorm

Kirk Langstorm was a zoologist at Gotham Zoo. He is fascinated about bats and that there lifetime is very long for a mammal that size. He made a serum, which had bat DNA in it, that could enable humans to have a longer lifetime. After testing it on himself, he turned into a man-bat. He had a small battle with Batman, but then he fled away after that. It is unkown what happened to him after that.