Kick Ass looks like it is going to be a fun film, but perhaps a bit disturbing. Problematic for me is that there is a lot of gun-play, which we tend to think the good guys would not be party to. Now, I am not familiar with the comicbook, but I imagine that since none of them have super powers guns are a necessity... Yes, Batman doesn't use guns, but he also has a lot of ridiculous tech to fall back on.
For me, Hit-Girl is going to be a big part of the film. Chloe's fight scenes are really cool, particularly since she is merely 12 years old. Certainly there is a lot of CGI and digitally removed wires, but that's everything these days. I think it is going to be pretty impressive.