Speculated this before on Westeros, but I've wondered if the Inverse Fire has some kind of thematic link to Tolkien's Secret Fire (being, perhaps, the anathema of life, that which destroys souls, and that perhaps the No-God's carapace is a method of mobilizing the Fire itself). In any case, I do tend to believe that the Inverse Fire is more than just a way of experiencing Damnation, based on the odd, almost reverent-like quality the Consult treats it with.
And then of course there's the obvious connection between Morgoth's twisting and corruption of life, since he can't create it anew, and the Consult's Tekne, which is results in soulless lifeforms (they can't make new souls).
Also noted that the Nonmen seem like a combination of Elves and Dwarves, what with their subterranean lifestyle and reputation for craftsmanship.