If the world doesn't die, it would be cool to eventually see some Atrocity Tales post-whatever. Like if the Consult is finally destroyed, have a story about a wandering skin spy trying to find meaning while never being entirely free of its hard wiring. Or the Consult is destroyed/2nd apocalypse prevented and a mandati/swayali goes on being tormented by the dreams.
Thinking about that, if Seswatha's heart goes on doing its thing, the Mandate/Swayal could go on using it as a tool to keep the monopoly on the gnosis (if consult gone, dunyain ascended/gone, gnosis not given away by kellhus). AND THAT brings me to a cool idea--Kellhus defeats Consult then ascends without fulfilling his promise of giving gnosis to anagogic schools--new war between the schools! ALL anagogics united against Mandate/Swayal.