IMO you should probably go to see the movie with the attitude that it is not the book. Don't compare it to the book because you will always be disappointed. Why? Because the director's vision of the story will almost certainly not be the same as yours.

Oh, and Crimson Phoenix, you ruined it the same way anyone can ruin a movie for people who haven't seen it - you discussed the details and removed the anticipation for those who haven't seen it. But I forgive you