One of Bruce Wayne's later nightmares (visions? Who knows, since the line is decidedly blurred), sees him exploring the family mausoleum (because that always ends well), only to discover his parents' grave is bleeding. Rather than running to the hills, he pokes at it until a gigantic, grotesque bat creature smashes out and fills just about everyone in the cinema's trousers with smelly brown fear. Pretty sure that was Man Bat, or at least a nod to him. Why can't we just have a horror Batman movie?