I just try to use my best judgement based on the trailers. In the end, I usually get dragged to see most by my brothers though (ugh!). I think, though, that unless something is based on a somewhat known super hero, most folks are completely oblivious as to whether or not it's comic based. I know a lot of people didn't know Road to Perdition was a comic, and there are a lot of others (I thought it was funny that Bulletproof Monk was, but in the commentary they admitted that they changed pretty much everything but the character's name (I think)). In fairness to the critic, there are a lot of really bad super hero comic movies out there, he's just ignorant of the other stuff that's available in the comic world.