Martin has already said he’s taking his series to the grave.
He also said he was going to finish it, so I take whatever he says with a healthy dose of skepticism.
Unless GRRM burns his voluminous notes (quite possible, as Shelby Foote did with his incomplete last novel), I expect his literary executor will choose some capable fantasy writer(s) to finish the GOT book series. His next of kin, who stand to profit bigtime, and many of his fans, will demand it. And that’s fine with me. There will inevitably be those who say the remaining books aren’t as good as the originals, but what the hell, I still wanna read 'em.
Abso-freakin’-lutely that, too!
An Iron Throne (and other sculptures) in a London park - a featured article on Wikipedia today:
Scenes in the Square - Wikipedia