I would think that if there had been that clause there would have also have been the use his ideas for the sequel trilogy clause.
Even putting all of that aside, the thing people keep forgetting is that George’s single biggest gripe wasn’t so much about having the unaltered versions out there (although he clearly disliked the idea), it was about paying for a proper remastering job. That’s why we got the GOUT instead of a decent dvd release.
He even said in 2010 or early 2011 that the initial bd release wouldn’t include the unaltereds because they were “too expensive to restore right now.”