My money is on a revamped 40th Anniversary edition which will include the Original theatrical version as well.

If you looked at the video from Star Wars celebration Europe/ John Knoll who was I think the lead on the special edition in 1997. He has already been tinkering about with the death star Hanger which has major issues. Claiming it was just a project he was doing in his spare time…

Mentioning the shape of the death star was like oval or egg shaped and it was not meant to be. The deathstar has been re-created meticulously digitally but is the shape it was meant to be now.

And also the death star plans were incorrect as an earlier design was given to the animator of the stolen plans and the death star dish was in the wrong place. This has been re-created meticulously. And the error could be easily fixed also.

We know the Massasi Temple is missing from a number of shots in the special edition also and it is clearly present in Rogue one.

But I would also imagine some very current unpopular changes will be reversed (there is little guess work about what needs to be removed to make it not stupid or horrible plastic looking). I would hope that we get to see a few extra snippets of footage intergrated as well from the actual time the film was made along with some cut music also perhaps. Definitely un-censor the gunshots.

I would hope for a 3 or 4 disc version with a bonus disc also.

New Special Edition
New Special Edition 3D
Original Theatrical
Bonus features (or intermingled with each version)

As Far as extra footage goes this is what I know of and would include in a new special edition.

Slightly extended search for R2-D2 on tatooine with a viewscreen of the scanner on the landspeeder.
The Stormtroopers search the streets of mos eisley (no stilt man)
Extra Cantina aliens from the time?
Obiwans cloak catching fire briefly when Darth Vader strikes Obi-wan down
Extra shots of Luke killing storm troopers in the DS Hanger and Leia’s dialogue restored
Some or any original extra model shots from the dog fight scenes /Battle of Yavin.
Uncensor Gunshots
Extra shots of Battle aboard Tantive IV?

Not keen on shoehorning in any “new footage” filmed especially or characters. All of that should go pretty much. Aesthitic backgrounds I can live with and matte painting replacements and matte line removal. CGI models as long as they are done photogrammetry from the original models they would look very very similar.

That’s my rule book on it.