Knock Off Version
I don’t know how the contract was written up between George Lucas and Disney when he sold Star Wars to them. Perhaps there’s a non-compete clause or something like that, but it’s unlikely there was a clause stating that George Lucas could no longer create anything. So what’s stopping him from making a new trilogy of movies that while not technically Star Wars, anyone can see it is his version of what Episodes VII-IX would’ve been.
He could have similar characters and similar concepts and just name them different things. It could still be set in space, and while the characters would be different, the story would be there and fans could insert the correct names themselves and get a full idea of where Lucas wanted to take Star Wars.
The question is would George Lucas ever do this? He does seem bitter about some of the decisions made with the Sequel Trilogy and could harness some Dark Side feelings of revenge. He can only be mad at himself though, as he could’ve put it in the contract that Disney had to make his versions of 7-9. The other question is would a studio be willing to make this? I think one would despite threats from Disney being bombarded down on them like blasts from an ion cannon.
How else could we one day see George Lucas’ version of the Sequel Trilogy?