- Firefight (Flood. If they’ll end up in the campaign)
- Elites (Invasion and UNSC Firefight)
- Dual wielding (Only secondary weapons)
- Hornet/Falcon
- Covenant version of the Mantis
Feel free to post what you think should be in the next halo game.
To sum up what the community want:
What you said +
-Spartan Ops
-Forge world (and/or similar map)
-Custom game options to the standard of halo: reach or better
-Camos available on a wider range eg. forest camo can be used on ALL weapons and armours
-Bring back SOME attachments/utilities (for armour) - perhaps make them interactive
-Interactions on maps eg. buttons that open doors like on Last Resort
-Bring back ALL weapons (At least for forge/custom games)
-Bring back ALL vehicles (At least for forge/custom games)
-Bring back ALL gametypes (At least for forge/custom games)
-Bring back Halo 3 style ranking
-Bring back Ranked and social playlists
-Bring back double XP weekends
-Bring back better playlists
-Make Dynamic lighting smoother
-Allow options to remove; sprint, flag carry, flood appearance.
-Balance Vehicles/Weapons (overall gameplay)
-Bring back equipment (not necessarily to replace AAs but as an alternative)
-Remove; Tactical and Support Packages
-File Browser that works
-Theater for more than one person also to watch cuscenes.
-Dedicated Servers
-Fill in some of the gaps of halo’s story in the campaign
-‘Mic only’ playlists
Think that’s about it. If 343 do; some of these - they will end up with a decent game, most of them - a great game, all of them - the BEST GAME EVER.
I they added EVERYTHING they wouldn’t have anything left for the last game 
I think they should trash spartan ops, not saying its bad just saying firefights better. Also yes the idea with the flood being in firefight. what they need to do is
make it mysterious creepy and you should be able to get better equipment as you play through the game. I know the concept sounds similar to black ops zombies, but halo black ops the experiences are completley different