Darth Stewie - it's funny, I was thinking the same thing earlier today, after I read (unless I misunderstood) that Ady shot new footage for the two rebel soldiers on the ground by the ion cannon on Hoth. Like anything else, it begs the question, "If he can do that, how much more could be done?" I won't claim to have a professional level of expertise in production and editing, but I would love to be part of the collaborative process to script a prequel that actually MADE SENSE with the OT. And I love the idea of producing it in a style that fits with the other films. For example, when I was little and heard Ben Kenobi refer to the "clone wars" in ANH, I had a COMPLETELY different idea of what that was all about (I know, me and everyone else).
Yes, I'm sure there would be all sorts of legal hoops to deal with and Lucas himself would probably put the kibosh on anyone trying to offer society a way to replace their memories of his "original" (a.k.a. family friendly, money raking) vision, but what if....? If this goes anywhere, count me in!