New Weapons And New Vehicles. More Of Customization Abilities With Your Charactor. Introduce More Flood And Forerunner Stuuf. More Than 1 Forge World So We Can Have Like... Mountains, Oceans, Deserts, Jungles. Just Add More Biomes. Add Boats Or Some Water Vehicles. So We Can Forge With Boats Or Whatever. The Year Is 3000 Maybe Later Or Earlier And There Are No Boats Or Anything That Works In Water. Also Add The Halo 3 Physics To Halo 4, Like The Melee, Grenades, Weapon Damage All Of The Halo 3 Physics Should Be Added To Halo 4.