I do agree that summer 2017 would be nearly the perfect time to do some kind of theatrical release of the OOT.
I think before/alongside Rogue One would be the perfect time. A re-release won’t steal any of RO’s thunder, but it could perhaps draw some skeptical older fans into the theaters. In particular, a RO/STAR WARS marathon could be awesome.
The problem with that is that they would have had to be working on a restoration for some time now in order to have it ready on time, which is certainly a possibility. But if they decide to use mike vertas restoration, they still could, but it means they’d probably pair it with subpar restorations of empire and Jedi. I doubt they’d release SW in any way other than alongside the rest of the trilogy. Unless they’re planning to do one a year.
Even sub-par restorations of Empire and Jedi are better than what we have and would even be mildly acceptable.