I would say you are really cheating yourself if you see the movie before reading comic. I used to spend alot of time hanging out at a comic book store and as far as mainstream comics go I don't know of anyone who doesn't think it is the greatest ever. You will really get more out of the 12 hours straight (you've been warned, once you start you will have a hard time putting it down so plan accordingly) that you will spend reading the comic book than you could hope to get from the movie. It's an experience that shouldn't be trivialized by whatever the movie does for you.