I like Kick-Ass for what it is, but there's nothing really deep or complex about it, just fun, violence, and pretty Romita jr art. Just a different take on real world superheroes.

Agree on the Babs thing. The whole walking thing aside, Batgirl would be a step backwards for the character. And despite what some people are saying Batwoman isn't suitable either for almost the exact same reasons.

She gave up the costumed life voluntarily and her going back to it "permanently" (as much as that word has any weight in comics) would be ignoring all her character growth.