I honestly think there's a wealth of stories that can be told in the years between ROTS and SW. The beginnings of the Rebellion, Vader hunting down and destroying the Jedi one by one while the remaining few either scatter or try to regroup, the struggles of average joes as the Empire asserts its control over each planetary system ...

And Lucas hasn't delivered on any of these.

The great thing about it is that you can almost completely ignore the PT, or not. The whole era's wide open.

Like I said, I'm really looking forward to this, and I hope others follow suit and start telling stories set in the same time period.