My theory is that the Demon Gods feed on the spectrum of emotion, sweet and salty. Maybe umami too. So they reward some of them to feast on their pleasant emotions.

I think you are spot on here. The head on the pole scene mentions two places a place of fire and shrieks and a place of skies and moans   . I think if you life forever in pain or forever in ecstasy depends on what you do. If you make your soul salty or sweet. 

[EDIT Madness: Fixed your quote tag. Also, nice to read you again, Darzin .]

Cnaur's secret is not a delusion. In ancient battles with hand to hand combat only about 5% of soldiers were killed in battle, whoever broke first lost and then could expect significant causalities from calvary mopping up. Obviously this doesn't apply to modern armies with Apache helicopters and shit. But for hand to hand sword and spear conflicts it absolutely does.   

I feel the characterization of Proyas and Serwe are both underrated they are so different from us, which is why writing them convincingly is no mean feat.

Prediction- The Ark of the Inchoroi is not the first, the other circles on the map are where other objects from space have landed.

Question- Where does Chanv come from?

Prediction- The religion of Eanna is a cult worshiping the Inchoroi.

He has always hidden, always watched, where Other Sons, recline, drinking from bowls that are skies, savoring the moaning broth of the Countless, bloating for the sake of bloat, slaking hungers like chasms, pits that eternity had rendered Holy ...

Prediction- This passage refers to those redeemed in the outside, which will be quite different from the glimpse we saw.

Prediction- The Cishaurim and possibly the Fanim are not damned. The Water cleanses them somehow.