I heard that Lucas orgianlly wanted it to be a 9 movie franchise and he's planning on realising 3 more movies after the original movies come out on Blu Ray and are released in 3d.
Someone needs to sit him down and talk to him.
There are like a hundred books after the movies. I don't see how they could possibly do that now anyway unless it's way into the future. I know I would refuse to see a movie that had someone that isn't Harrison Ford playing Han Solo.