If unsc marines are in halo 5 what BDU do you want them to have halo 4 BDU or halo 3’s and same with the Ai i say bit halo 4 as when marines are on turrets on infinity but everything else halo 3 squad tactics etc
Just to keep it consistent I’d say the Halo 4 designs but with some changes. Change the awful color schemes and fix the AI. Halo 4’s marines had the worst AI to date. Second choice would be either Halo 3 and Halo 2’s BDU’s. Those are my personal favorites.