Technically, Coruscant was there before PT.
Well I don't mind seeing some stuff introduced in the prequels (planets, double-bladed lightsabre etc.) but I don't want to see crap like "midichlorians" or "chosen one" and certainly don't want to see any characters from the prequels (for example using Hayden as Anakin's ghost is the stupidest thing I can think of atm).