Did you see Empire of Dreams? I think that's where they talked about how the cast and crew refused to listen to Marquand, and that Lucas ended up doing more than he was originally planning on doing.

Still even if Marquand was as integral to ROTJ as Kershner was to ESB, the fact still remains that Lucas employed all of these people to make his vision into a reality. They helped him hone his idea, but it was still his idea, and in the end, Lucas still commisioned those people to make that for him.

So he owns it in any way you could imagine. The work of the artists he employed belongs to him, and as such he can edit it into his movie in any way he sees fit.

I know a lot of you think that because a lot of us really enjoyed it that it belongs to us now, but that's just not the case.

All we did was enjoy it. Lucas is the guy who made it all happen.