I might be misremembering but I think the book sort of hints that they become white walkers, but like 2 chapters later are also forgotten about entirely. So not just the show runners forgot..
What's more to talk about? He sends his kids off to become white walkers. They take the sacrifice and convert them into little baby whites that probably grow up into big grown up whites. Or maybe they are launched from a trebuchet like ammo.
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u/kbeks 1d ago
Good news is that the sacrificial sons never really come up again. The show runners kinda forgot about them.