I don't like the idea of taunts. My ideas
1. Maybe they could bring back armor effects, also weapon effects would be pretty fun. Eg a rocket launcher bullet being fired at you, but with butterflys circling around it.
2. If Cortana is not in the campaign, maybe we could have her as the multiplayer voice, that reads out the medals and etc.
3. WATER VEHICLES. Across all the Halo games, i've always wanted a boat. It could make for an excellent BTB map on an ocean map.
4. Map remakes - Don't bring back every map. But remake the favourites. Like Lockdown, Ascension, Last Resort, Blood Gulch, and have a few from Reach like Sword Base, and Countdown.
5. A bigger Forge map, instead of 3 Forge maps, just give us one big map, it would be awesome to have a Campaign disk, and a forge/multiplayer disk.
6. Change Flood back to Infection, and have a mode like Firefight, but where you have to fight off the Flood.
Those are my ideas, thoughts?