I wonder why the comic wasn't adapted, or at least the story followed closely. I'm thinking it was a cost issue (not as many space scenes, confined sets), but it could have been simple hubris on the part of the film makers who figured their take on the story was the superior one.
I don't necessarily hate the film. I just find it forgettable. I watched it shortly after release on DVD, and have had no urge to see it again.