None of this speculation makes any sense. Kennedy wouldn’t have taken over LFL if she wasn’t allowed to make films. >By the time Lucas dies, she’ll probably be retiring herself. Not to mention, Lucas was planning on gearing up >production on more SW films before he sold the franchise, so there’s no reason they’d have to wait until after his >death (what?). Plus, the sequels have, in fact, used many elements of Lucas’s treatments.
Lucas changed his mind while writing the new scripts. He said, “If I’d held onto the company I could have done it, and then it would have been done. Of course a lot of fans would have hated it, just like they did Phantom Menace and everything but at least the whole story from beginning to end would be told.”
The key word for me is could. At some point, he decided it wasn’t a good idea. In retrospect he might be annoyed that Disney changed a significant portion of the saga, but if Disney hadn’t created a sequel trilogy I imagine he would let the saga stay at a clearly defined rise and fall of Anakin. But once Disney came along he knew the ST was inevitable and gave the discarded scripts anyway.
“At some point, he decided it wasn’t a good idea” is him deciding he didn’t want to be the one to make them, which is why he sold the company.