Dynamic Weather
I think dynamic weather would be a cool feature, especially if it affected game play. Rain, snow or wind could alter the AI's decision-making. Vehicles could handle differently; speed and visibility could be affected. It's just a tiny detail that would be nice.

Space Battles
Hey, how about some zero gravity space battles? A zero-G firefight would be majestic! Picture a battle in orbit over some planet. Seraphs and Longswords spiral around you in dogfights. Capital ships exchange heavy rounds. Space is littered with debris. The level could have the slow rolling feel of a drift dive. A special unit of Covenant space troopers swarms UNSC ships, and it's up to the Chief to defend them and plant a bomb on the hull of one of the Covenant cruisers. At different points in the level you could have Chief running along the hull of a Covenant Cruiser, drifting through the wreckage of a ship as well as bits of free fall combat. Moving Master Chief in a totally zero-G environment would be tricky but well worth the learning curve to fight in space.


Multiplayer Bots
The fact of the matter is that not everyone has Xbox Live. Even if you do have it, sometimes you want to brush up before taking it to some flesh-and-blood chumps. How about some programmable bots like the ones in Perfect Dark for N64? In a pre-game menu, you should be able to program skill and attributes to the bots as well as assign skins like, Grunt, Marine, Brute and so on. halo-wish-list-4.jpg

Adversary Mode
A cool spin on co-op. One player is the Chief, while someone goes through campaign jumping from Elite to Elite (also cribbed from Perfect Dark). Put this on Xbox Live and you could have several people as Elites battling one unlucky Chief.

Live Co-op
If I can have only one wish fulfilled, it would be this one. I want Co-op on Xbox Live. You and your buddy ducking it out side by side, each on your own box. You could work out your own geeky field jargon. How about teams of four? Bungie could weave this into the story by having the SPARTAN program resurrected. Or the game could just let you play as Marines or ODSTs. Hell, let's blow it out! How about a massive online co-op campaign mode with 16 person teams and Marines? I want big huge Lord of the Rings scale battles, in big open fields. Man oh man, that would be fun!