Plate wearers can obtain a Neltharion-themed cosmetic set comprised of two pieces of armor in Patch 10.1.
The set is limited to Plate wearers and will most likely drop from Aberrus, the Shadowed Crucible raid. It consists of just two pieces of armor. Neltharion’s updated model uses both the Helm and Shoulders.
Neltharion Plate Helm
Neltharion Plate Shoulders