“There is a 97.6 percent chance of failure,” one of the characters says in the new trailer for Rogue One: A Star Wars Story, referring to their scheme to steal the plans for the Death Star. I’m not sure the percentage is that high for the movie itself, but it’s got to be up there. There’s a lot of risk for Rogue One, or at least as much risk as there can be for a Star Wars movie. It’s got to prove that there is life for the franchise beyond the main “saga” films. And it’s got to prove that a prequel can work in Star Wars (previously, it hasn’t always worked out for this property). Even in a galaxy far, far away, those are some awfully big questions.