Just me, but I think that assuming these new movies will be set not a long period of time after ROTJ (i.e, while the gang's in-universe is still young enough to be having adventures like in the EU books), they should just recast them. I mean, they did it with Star Trek, and that turned out fine.
"Grant Allen [...] had written a book about the Evolution of the Idea of God. [...] it would be much more interesting if God wrote a book about the evolution of the idea of Grant Allen." ~ G. K. Chesterton, The Everlasting Man