I've looked through all the appearance styles as well as the lead list and I haven't seen anything about an Ancestral motif for Necrom. Seeing Ancestral Dunmer/Chimer armor was something I was really looking forward to for this expansion, especially since the projection of Nerevar in the Clockwork City could be in something other than Ancient Elf/Ayleid/base-game-Maormer armor. Is it being delayed due to all of the leads that are already in the Telvanni Peninsula zone? Maybe it'll be a reward from the endless dungeon?
To my knowledge, this is the first time since antiquities were added that an expansion zone didn't have an ancestral style; and the second time a new map didn't have an ancestral motif (first being Galen). Lost tomes of ancestral knowledge would've been perfect for the expansion focusing on Hermaeous Mora and the ancestor-worshipping Dunmer.
Maybe they were in the Indigo Tomes Ayrenn stole
Still waiting for answers about class set aura behavior, and also hoping that one day hair dyeing will be an option. We know it's canon thanks to a book in the Manor of Masques! (House of Reveries: The Troupe)
Proud owner of a Morrowind Banner of the 6th House (back when it actually meant something)