Probably, although Martin was definitely not the first fantasy author to put a villainous faction/entity in the inhospitable frozen north, nor was he the first to have a villain with a zombie army.
Although I think the Mountains of Muscles are more likely just a border feature slapped in between the Necrolord and the ambiguous barbarians of the northern steppes, which are again a common trope but probably directly drawn from the barbarian tribes of Icewind Dale (Wulfgar's people in Forgotten Realms).
There's no way the Ice castle of the necrolord and the mountains of muscle aren't a Fire &Ice reference
Probably, although Martin was definitely not the first fantasy author to put a villainous faction/entity in the inhospitable frozen north, nor was he the first to have a villain with a zombie army.
Although I think the Mountains of Muscles are more likely just a border feature slapped in between the Necrolord and the ambiguous barbarians of the northern steppes, which are again a common trope but probably directly drawn from the barbarian tribes of Icewind Dale (Wulfgar's people in Forgotten Realms).
I believe op is referring to Bakshi’s Fire and Ice, not martin’s books. The rest of your point still stands though.