I don't know if I can watch this movie. I've read the first few books and I can't square Tom Cruise with the main character. Jack is supposedly 6'3"+ and anywhere from 220-250 pounds (depending on whether he's at his normal weight or super muscular from extended time digging swimming pools in the Florida keys). Cruise is the antithesis of this and I'm not sure I can overlook that enough to enjoy the movie.
I don't dislike Tom Cruise as an actor. His personal craziness aside, I've enjoyed his work over the years. He just seems like the completely wrong fit here.