I imagine that Revenge of the Sith is very much the film Lucas's fans want to see, but are some of them ready for an anti-Bush diatribe? Though every Star Wars film until now has existed in an insular comic-book world, a lot has happened since 1999 and 2002 in the real world and Lucas dares, for the first time, to address how the hollow political conflict in his franchise correlates with the reality outside its panels. (It would have been stupid not to strike a parallel.) Revenge of the Sith's two greatest moments tap into the uncertainty of our...