I was at Celebration II, and at the Rick McCallum spectacular, someone asked him if the rumors were true about inserting the Imperial March into ANH, and he gave one of those non confirmations that went something like: "I can't talk about that, but you are very very good."

I don't know, if anyone would re-score a movie 30 years after it was first released, it would be Lucas.

I have also seen interviews from Williams where he expressed disatisfaction with the way his music had been re-cut after the fact.

Maybe they would only re-score the post edited stuff and leave most of it in tact.