This is an interesting article. No definitive link
Post# of 96879
"First, what is the purpose of this Star Wars 4K restoration? Is it strictly for internal reference or does Lucasfilm intend to make public use of it? When Disney bought Lucasfilm in 2012, their deal came with all kinds of strings attached, including 20th Century Fox holding the distribution rights to the original Star Wars in perpetuity (as well as theatrical and home video rights to the rest of the films until 2020). If this restoration ever sees the light of day, it will have to mean Disney and 20th Century Fox working together, which is easier said than done."
http://www.slashfilm.com/star-wars-4k-restoration/