Ok, I'm looking for a story that I read about 2 or 3 years ago. It was not exactly JL but more Batman/Superman x-over. Maybe pre-JL. All I remember is that Superman wants to know about this vigilante Batman and goes to Gotham as Clark Kent. I think there was something about "Zombies"? and a fire/earthquake or something like that. I simply cannot remember where I read it. Maybe someone can help me?