The very first piece of concept art for Destiny released by Bungie showed a small group of Fallen and a Walker. The Fallen looked much different than the standard ones we have now, and even the SIVA variants. Instead, they had appropriate equipment for a snow environment. Like the Plaguelands. https://i.kinja-img.com/gawker-media/image/upload/s--7VxGll4u--/c_scale,fl_progressive,q_80,w_800/1461237182498563909.jpg Would've been the perfect time to introduce these. Kinda sad it didn't happen. :(