I agree, Lucas and Co. are pretty good at the disinformation biz, however, I wouldn't point at Supershadow as a good example. Supdershadow is a comic genius, not some branch of Lucasfilm disfinormation. If he were. Lucasfilm certainly wouldn't have shut him down for a short while, nor would they have required him at one point to carry disclaimer that clearly said the entire site was fictitious.
I won't speculate on who George's inspiration is because honestly, I doubt George even has an asnwer. His work is too sloppy, too poorly constructed and slapped together to be the product of any kind of master plan. As for his comments about having the right to rework the OT as much as he wants. Yeah, I've heard it before. And sure, they're his films, he can do waht he likes. However, that does not excuse him from his responsibility to society to preserve an important part of cinema history. What would Lucas say if Fritz Lang were alive today and decided to tinker around with Metropolis? Maybe dub in some voices, new CG effects, perhaps change some scenes, add some new ones, and then never release the original again. Well, considering his stance on the Stooges, I'd imagine Lucas would take issue with that, because, well, Lucas is a hypocrit.
As for the green screen stuff... That's just stupid. There's not a snowball's chance in hell they filmed an entire trilogy under wraps. too much money, time, and people involved to keep anything like that silent this long. Too many people have come and gone at ILM and lucasfilm for not a single word of this to have leaked out. Not to mention you seem to have a poor grasp of what green screen technology is actually capable of. Honestly, this is the kind of speculation that Belongs on Supershadows site, because there it would be abundantly clear that it's a work of comedy. Here, you come off like you're serious, and it kinda blows the humor factor of the posts.