I wasn't a fan of Episodes I or II but I thought III was a pretty good movie and tied in rather well to the story leading up to where IV started. Am I alone in thinking Episode III was decent?
With that said, Disney better not even THINK about re-treading episodes IV-VI. Like many of us, I grew up with the original, watching all three in the theaters and again later all three on HBO at home in the 80s (should have recorded them on VHS back then dammit!). I would have a hard time adjusting to any new episodes with new actors playing Luke, Leia, and others. At least with episodes I-III the actors were all young representations of the characters and easier to accept as not the original actors. But there will be new characters written in to be sure.
We are now approaching a possible three generations of Star Wars fans in the same family lineage, so it is inevitable if the franchise is to continue, the sword needs to be handed down to other generations with new ideas. We will only have one true Star Wars as it were, those of Episodes IV-VI of 1977, 1980, and 1983. There will never be another equal. We must all accept that fact and move on.