Something similar to the Masks from Festival of the Lost and Horns. You would need a specific material and you could upgrade blue armor to legendary. Bungie said that TTK would have the largest amount of gear since the launch of destiny but the only relevant gear is still just Vendor gear, Raid gear, IB and Trials gear. There are a lot of cool looking blue armor out there but it is instantly dismantled. I think it would give us more options rather than everyone looking the same, yet again...