If you had looked closely, and I mean very very closely to the image, compare it with this one Look at the middle spartan crouching down they look very very similar. From what I read in the halowikia, the GRD helmet was cut from the game and was turned into a spartan toy easter egg. this one! Which has now found its way to Halo 5 Forge!
Now if I remember correctly, there was a mysterious armor in the Ghost of Meridian teaser, the helmet doesn’t look exactly the same, however how 343 they will add their own style to it. Could the mysterious armor be the GRD armor?
