Money? It's considered a "Cheap" movie. I'd bet it'll get enough money to cover the expense of the the production. Heck I bet they are in the black already even before wide release, with some international distributors.
i dunno.. there are some movies you just know are gonna be bad.. for instance, the acting in the trailer for Catwoman was so bad, you knew that if that was the best part they could find of the movie to show the public it was gonna suck
I like the blues so this one piques my interest. Sam Jackson said he learned to play a few numbers "by wrote" on guitar for the part. He's actually on 6 cuts of the soundtrack.