In my mind, the Empire dies at the end of Ep 6 and anything thereafter is boring. Anakin has "brought balance to the Force" and all that Jazz. Story over.
Any continuing story would be like the EU books in some regard with lame things happening like Han and Leia getting married and having kids (and if you thought Han was neutered in ROTJ) and Luke starting his own Jedi academy.
The Thrawn trilogy wasn't bad, but I wouldn't want to watch it on the big screen.
Well, logically just because the Emperor and the Death Star were destroyed doesn't mean that the Empire was defeated. There were still many many ships and all the Mofs and stuff like that.
If they ever do something after ROTJ, they should do the New Jedi Order, that's some serious stuff