They don't ``come out early''. Ten-to-one it's gonna just be a videotape copy that's been transferred to DVD (for the Star Wars trilogy), or a videotape of a big screen projection transferred onto DVD (for the movies that were released to the theater last week). It's alternately possible that someone managed to get their hands on an actual projector positive and had it professionally transferred, which is not outside the realm of possibilities, as DVD duplication requires a pretty serious facility. In fact, they're probably being produced by the same facilities that make legitimate DVDs.