I figured as much. At first I thought it was just a direct copy from TDTCB cover, but realized that the text doesn't surround the building thing. A coloration of the chapter headers then. Either way, very cool.
As for Kellhus, "then what" is pretty much as far as it goes. I think some common suggestions are: save everyone, save himself, become a god, seal the world from the gods, get everyone killed, join the consult, destroy the consult, steal/use/learn the Tekne, become a self moving soul, or some combination of those things.