I would love to see the armour in the championship bundle from Halo 4 make a return in halo 5. The armours looked like this: http://gamergrub.com/v2/wp-content/uploads/2013/08/Halo-4-Champions-Bundle.png
I think they were really well made compared to the other halo 4 armour sets in my opinion. All the chest pieces in halo 4 looked the same I think.