Blizzard has added many new ensembles with the 10.0.5 PTR today. Some are returning looks, but some seem to be exclusive new ones.
Patch 10.0.5 Added Ensembles
Collect the appearances of the Battleplate of the Honored Valarjar armor set.
Collect the appearances of the Battlewraps of the Honored Varlarjar armor set.
Collect the appearances of the Chains of the Honored Valarjar armor set.
NEW Collect the appearances of the Corrupted Runelord’s Regalia armor set.