TWOW is a sure thing but ADOS is another matter entirely... and I'm not even 100% sold on the idea that the story will be finished in just two books.
With the caveat that I've done literally no research, I give it a 70% chance that GRRM finishes the books and a 30% chance that someone else eventually finishes for him.
BKSheikah owned me so thoroughly in the 2017 guru contest, I'd swear he used the Lens of Truth to pick his bracket. (thengamer.com/guru)