Awe, I really hope its real though, would be awesome.
To the earlier nerubian chat, the possability of having both them
and the underwater cities of the naga and maruka would be awesome. The faceless (totally forgot all about them) were first seen in WotLK, we now with Cataclysm see that the old corpse in Darkshore was a faceless (sorta-beach side too-- they might of, when the world was young, rose from the depths in some sort of uprising against the titans on command from their master), and there were (lorewise, thousands I'm sure) aquatic based faceless and even a kraken-ish one
There seems to be different species both land and water based which really makes me wonder just how many varieties lurk in the black depths, aquatic and subterranean. The best view we get of the nerubian kingdom is in Ahn'kahet which is where we first see the faceless, so, if they expand on their kingdom, we might get to discover the subterranean faceless' kingdom or spawn or er, home as theres obviously a passage the faceless are erupting from to invade the nerubian city
(eeeeeeee I love speculating SO much XD I so hope, regardless of title name, we get something like this)