This sounds encouraging. I read this on the Steve Hoffman forum posted by the user who did work for Lucasfilm on the DVD’s of Star Wars, Empire, and Jedi. He said:
“BTW, this didn’t get a lot of publicity, but about 2 months ago, Disney requested that the Library of Congress make for them a scan of the original 1977 copyrighted theatrical print of Star Wars. I casually know the guy who did the scan over at the LoC. My bet is that they’re going to use this for reference to see where all the cuts, changes, alterations, and titles were done. But even if they started today, I’d be surprised if they could get a remastered 4K version done in a year.”

Be warned, there are TFA spoilers interspersed throughout the forum comments. Proceed at your own risk! Here’s the link.