As far as I know, the Marvel Zombie universe has yet to crossover into the DC one. This was fantastic because it was a character who was truly their own. Looking at this, it's almost hard to determine whether or not Batman has a lower jaw. It looks like he doesn't, but it kind of looks like his neck extends where his teeth should be. This also has a background and a fairly elaborate one at that. His fingers look like claws which suit his form as a zombie.
He appears to be somewhat emiciated or dehydrated which is probably what would happen to a zombie. I like how you equally distributed the holes in this outfit. It's that macabre drawing skills that make this stand out. I would love to see a cartoon with him or some other superhero zombies in it. He also appears to be in front of a full moon.