I dunno, I'm not a comic book guy, and quite honestly I thought the first Sin City was only interesting because of the visual style. In that regard, it was pretty ground breaking. But that was almost 10 years ago. It's old news now. Otherwise the stories were shallow and not particularly interesting, unless you're in to the comics in the first place. And the vast majority of the movie going public isn't. So it's not a big surprise that this bombed. Maybe if it was made a couple years after the first it would have done better.