Ideas:
-Have some form of survival mode but with ODSTs against the flood (fight to the death, not like firefight but NOT like COD zombies!)
- ^that means the return of the silenced-SMG
-Better designs for Armour. Personally, I thought quite a few looked ugly and somewhat stupid in Halo 4.
-Lose all armour abilities (except sprint) and bring back the equipment from Halo 3
-FINE EDITING, LIQUIDS and bigger maps in/for Forge!
-Considering Halo 5 will be next gen, more player per map and gametype.
-Remove weapon/ability drops and go back to placements...
-Visit YouTube for more ideas from the community=