If you watch the first [Star Wars] movie, you don't actually know exactly what the Empire is trying to do. They're going to rule by fear -- but you don't know what their endgame is. You don't know what Leia is princess of. You don't yet understand who Jabba the Hutt is, even though there is a reference to him. You don't know that Vader is Luke's father, Leia is his sister -- but the possibility is all there. The beauty of that movie was that it was an unfamiliar world, and yet you wanted to see it expand and to see where it went.