I didn't think of this... The PT had it's share of problems with using OT characters, such as people not liking kid anakin very much, or teen angst anakin. It really wasn't until the 3rd movie that they nailed his character. I guess this sort of stuff can happen in the newer films. IMO the droids were ruined in the PT and never needed to be there. Obi-Wan was decent but had absolutely no back-story or personality. These things mar the OT a little, I suppose. It is a risk to toy with the OT characters once more, but I think everyone is delighted at the idea of seeing them again on-screen. Harrison Ford might look a little old to wield a blaster or something, but he can still pilot a ship, right? And of course an old, maybe even bearded Luke with robes and all is an interesting thought, to say the least. And it would be easy to bring the droids/chewie back. I guess there is a risk of over-saturation...perhaps too many characters even? I guess the possibilities are just endless at this point for ways to screw up what already exists. Let's just hope the people in charge have a love for it.