As far as I’m aware this is all the info that’s publically available:
He is also referenced briefly in this post:
Specifically:
I don’t believe anything I’ve said so far about them connotes shambling, unthinking hordes, or “converting the locals into Deadheads.” The main one Archlich Ghaesh will be interested in converting is you , and in more of a Richard Dawkins way than a Richard Matheson way.
Additionally:
Exciting stuff! Very curious what choces we’ll have in our interactions with such a powerful and independent entity. Can we destroy him? Claim his power for our own? Fall under hiis sway? Even falling under his influence, would this be a “bad end” or would it continue the story on a different path in some way? A lot to look forward to there, I think.
