I an pretty sure Yoshi P said elsewhere we wouldn't be visiting Old Shalayan any time soon so while we might have something with the Isle of Val I doubt Old Shalayan will be involved. Most likely if we are somehow visiting the Isle of Val it will be in an instance or something similar. I mean maybe they could add a new zone in a patch but save for the Diadem, which isn't really the same, they have never done anything like that.