Originally Posted by Couchpotato 
Well unfortunately it's not going to happen any time soon. It's not skyrim and I doubt it will ever be. Though I would be intrigued with a new setting and character after the third game.
Just finish Geralt's story then they can do whatever they want.
I hear that after they're done they'll be doing an RPG using the setting from "Fading Suns." Heard it from a reliable unnamed source too.