maskerade32 said:
i would be awesome if 343 did pick this up as a project

propably never happen but so awesome if it did XD
I think Microsoft would be a little hesitant after what happened to Halo: Wars. But maybe if they see more threads like these, and how much support they're getting, I think it could work.
I can see this working really well. The Halo extended universe is massive, and there's plenty of opportunity to expand. There can be small scale battles on the ground, like we're thinking of. But why stop there?
There is plenty of opportunity for other game types in this vein. Imagine space combat! You could choose a giant battle cruiser from either side and go at it with plasma weapons and MAC cannons. Or choose a space station, limited mobility but highly resilient and powerfully armed, or you could go for a smaller ship-to-ship vehicle to get up close and personal (more like the space combat in Reach).
And of course it wouldn't be limited to this. I'm just brainstorming here, but think of having giant battlegrounds set up where players can choose their role for each spawn. Some people could pilot the ships, while some people could take on individual Spartans or Elites and try to infiltrate the other players' ships to take them down from the inside. A ship that has been infiltrated could call for players on their own team to spawn inside to defend them.
Wow, I've just worked myself up to a froth. This would be so awesome if it happened. I wish I knew how to mod.