This is speculation but I think GW's plans with the Aelves release is relating to them slowly building their old world pantheon back up but with their resurrected counterparts like Morathi trying to be the new Khaine, Mathlann being slowly remembered into reality by Deepkin, and Teclis, Tyrion, and Allarielle being the new Hoeth, Asuryan, and Isha.
Also I think if they ever expand Sylvaneth, they may actually add Kurnoth (probably Orion new form) since they mention him a couple of time as existing in lore.