To humor the OP, I think it’s just too big of a deal for it not to finally happen at some point within the next few years. There are just too many factors pointing to another release on the horizon (insert Egon photo here).
Even the SE is in lousy condition and needs a fresh remaster, whether that ends up being the RMW job or something else.
The new films are trying very consciously to recapture that OT feel. A release of the OOT by the time Ep9 hits theaters would only make sense.
Next year is the 40th anniversary. Even if it’s not happening by then, they can’t expect to let it pass without saying something on the issue.
Fox’s countdown clock to 2020, when they completely lose the rights to five of the six films, is steadily ticking away. I don’t know about the rumour that people at Fox don’t feel comfortable being involved in an OOT release while Lucas is still alive. That just seems stupid even if it is true. Even if Disney sits on it until after 2020, they still have the problem of Fox owning ANH forever.
But here’s the big thing to consider:
Lucasfilm has milked the releases on these various formats to death without ever including the actual films people wanted in the first place. Well, they released it in 2006, in the shoddiest possible quality that you could still technically call dvd.
The '04 release had a documentary and that was about it. Then the bd had deleted scenes. What will they come up with to sell the 4k UHD release? I really don’t think there’s anything left at this point besides including properly remastered transfers of the original versions.