I simply have to like this a lot because Black Cat's in it. She's one of the hottest Marvel characters. I don't know if this means anything, but I always found DC to have sexier characters like Starfire and Vixen. I do think you kind of tend to focus too much on butts. I guess that's just not the kind of person I am. I like how you get a good shot of her boobs.
I rarely even hear much about Spider-Woman. It seems like their bodies are a bit too slanted. That's of course, to make it sexier, at least I'm fairly sure. You did some pretty good work with shadows too. Black Cat's clothes look like they're made of her own hair.