Well, If you go to the Bungie forums you can find lots of threads/ideas for new maps, weapons vehicles, and just about anything you can think of.
So, does anybody here have any ideas?
At Bungie the main things people want are
1: a new Forge world.
2: new vehicles.
Personally I'd love to see drop ships,(Phantom, Pelican) More falcon variants(Grenade, Troop) Different versions of the Banshee, land troop transports, (Elephant, Scarab) and sea vehicles( a warthog type boat, and a barge thing to ride on) in a new version of forge world.
I'm going to focus on new vehicles, and leave the other stuff to other people.
This is only a small fraction of what's on my mind, but I don't have time to post more now.
And, please don't put things you know aren't going to happen/are pointless.