Remember when the unaltered were released on DVD, George Lucas wasn’t against the release, he was against spending any money on it. It is not his money anymore.
The reason the GOUT DVD’s were released, can be attributed mainly to the growing market of OOT bootlegs in the early 2000s, based on the old laserdiscs. By releasing a subpar release based on the latest laserdisc master, he could stiffle the bootleg market, but still have the canon version be the superior release in terms of quality. You just have to look at Ebay to see, that this strategy was successful. The OOT bootleg market is non-existent. A few fans preserving prints, and sharing them isn’t going to concern Disney. If OOT bootlegs start eating into their home video earnings, that’s a concern for them.
So, I believe Lucas is very much against the release of the OOT, especially if the theatrical releases could potentially compete with his canon versions. I also don’t believe Lucasfilm or Disney will release the OOT against the wishes of the artist who created them. My guess is, that a 4K mastered release of the SE is on the horizon, which is the reason the Disney people are culling through archive material, in order to supplement their release with unreleased bonus material, such as the footage shown at celebration.