It's hard to say. I know that my friend's lab actually washed the trilogy a few months ago for LFL. And I don't think the 04 versions exist on film. So either her lab washed the SE's or Theatrical Versions.

We returned to the Lucasfilm Archives to search exhaustively for source material that could be presented on DVD

according to Jim Ward, so it could be possible they dug up some preserved print. Otherwise the D2 masters would be only slightly better than the LD resolution. I have my hopes up, but I'm also prepared to have my heart broken. Spoken like an SF Giants fan.