This year’s very first Patch 10.0.5 adds multiple armor ensembles. Check them out!
The armor ensembles will most likely be available from the Trading Post.
Ensemble: Chains of the Honored Valarjar (Hunter, Shaman, Evoker)
Ensemble: Twisted Arcanum Regalia (Priest, Mage, Warlock)
Ensemble: Vestments of the Nightmare Forest (Rogue, Monk, Druid)