Well, I don't happen to think anything was all that wrong with Episodes I,II or III, but I am a super Star Wars fanboy, so pretty much Lucas can't mess anything up in my eyes.
Anyway, what they should do with this TV series is set it up like Babylon 5, which was probably the absolute best Sci-Fi TV series ever. Like, if they have a definate begining, that being the end of Episode III, and a definate end, that being Episode IV, and a definate number of shows, then can pull it off.
Too bad I don't have television.