The most interesting thing about these sequels for me will probably be years after they are released, and people are evaluating the George Lucas Star Wars versus the Lucas-less Star Wars. It will be interesting to see whether people look at the prequels with a more forgiving eye based on what JJ did to the franchise, or if they will wish JJ had done the prequels. In short, how easy will it be to capture the fun adventure spirit of Star Wars? I have no idea, and that's pretty exciting in any case.