Jon Favreau knows how to make a comic book movie. His great contribution to the series is his respect for the original work and the fans. When things are changed from canon it is a good change, a change that makes sense, and a change with a purpose other than some producer somewhere along the lines thinking it would be cool. Iron Man 2 makes changes to the original stories, but it does it well and with only one or two sore points that will need to be addressed in the next movie to keep true fans heads from exploding. However, even those outstanding issues do not take away from the fun that is Iron Man 2.