Oh, wait, almost forgot, the movie would have to have a killer soundtrack. Having songs for the mood of each countries cars. Rock and Country (gotta have Hot-rod Lincoln, or a remixed version) for American cars, Techno (the good kind, not the crappy nerdy kind) for the Japanese, Classical and Violinist for the European cars (remixed classical is pretty cool). But it would have to be in the correct times. If its an intense scene, there would have to be a tense music, when its needed...