This site talked about a quote which might be good:
http://www.primaryignition.com/2011/09/04/blatant-insubordination-blaster-control/
During the promotion for Revenge of the Sith, prequel trilogy producer Rick McCallum said something to the effect of: “I’m convinced there won’t be a definitive version of Star Wars until George [Lucas] dies.” I remember thinking that was a bit harsh. But you know what? He’s probably right. Heck, if you’ve got the Revenge of the Sith DVD, watch his commentary on the deleted scene where Yoda arrives on Dagobah. He makes a comment about George “tinkering away” on future versions of Star Wars. Because George Lucas, among many other things, is a tinkerer.
Found the full quote in this article:
http://www.ew.com/ew/article/0,,1041491,00.html
The Next DimensionGeorge Lucas plans 3-D versions of all six ''Star Wars'' movies -- First converted film will come out in 2007Mar 28, 2005
''I am convinced that there will never be a definitive edition of Star Wars until George dies — he will keep tinkering right up until the very end,'' says series producer Rick McCallum. ''It's a nightmare I had many months ago: I'll wake up at 80 years old in my wheelchair with George and his daughter calling me saying, 'Rick, we're looking for the sound elements from Episode II. Can you come up to the ranch?' And I woke up in a cold sweat.''