Just seen the trailer for the first time (like I say I am a newb here). I Loved the new dialogue between Vader and the Emperor. Sounds very similar to the original. Also sounds more natural than that wordy exposition crap that GL wrote for the DVD. Poor old GL can't write dialogue to save his life. If only The PT actors had had the balls to quote Harrison Ford to him:
"George, you can type this shit, but you sure as hell can't say it..."