If ANY more movies are made, there should be one prequel movie to the saga called "The Beginning," set a long time before episode I, hundreds or thousonds of years. There should also be one sequel movie to the saga called "Spawn of Jar Jar." But seriously, something like, "The Fufillment of the Prophecy" or "The New Republic."
Neither of these movies should have any major characters from episodes I-VI.
However, the best case scenario is if George Lucas JUST LEAVES STAR WARS ALONE and moves on with his life.