Re: Years between movies
Sebastian Sshaw (Anakin in ROTJ) was about 80 when he filmed it. It makes sense that the injuries and time under the mask and all caused him to age but you'd think the ghost would look the right age. I suppose Lucas expected Anakin to be a little older back then (remember he was 12-13 as late as the third draft of TPM.
On the time scale between 2 and 3 though, I can see most of the Clone Wars happening then - we'll only get to see the beginning and and (damn! damn! damn!)