^^Blade runner style release sounds somewhat likely to me. Disney did pay 4 BILLION dollars. They are known for making excellent digital negatives out of all their movies (even if the releases don't always reflect it) So most likely they wanted a digital negative of the OOT as well now they own it. (and the '97 and '04 release)
Do they own it though? It was my understanding that Fox still owns the original movie. Disney bought Lucasfilm and the rights to all sequels, new prequels, reboots and spin offs to Star Wars and Indiana Jones, but I don't think they own the original films.
20th Century Fox controls all theatrical and home video distribution of both Star Wars Trilogies, and they own A New Hope in perpetuity.
For 4 billion dollars? Eh, Disney will work out a deal with Fox on the side ;)
I mean Disney wants to market their new movies, they need the first movie to hype it up, sure they can spend some extra cash to restore it and strike a deal with Fox for distribution. (Especially since Disney would be doing all the work)