I can only assume the campiness was intentional
Given the dialogue and the fact that the cast is sort of a who's who of has beens, I can only assume the director was going for camp when this was made. I didn't read the graphic novel so not sure if the humor was there. Overall it wasn't terrible but it seemed like it couldn't decide if it was a comedy or an honest to goodness thriller.
Anyway, that's just my impression. THoughts?