Here are my ideas for halo 4 that I have been thinking of for a while and I hope you all enjoy them!
I think you should have every vehicle from every halo game in it and be able to drive all of them ( pelicans, phantoms, scarabs, civilian vehicles, seraphs etc etc)
I think you should keep the DMR and bring back the BR because people like the BR at the same time others like the DMR. (like me)
In forge you should be able to use every vehicle, be able to put in things that you can interact with like doors, elevators etc. Be able to change the terrain of the map, be able to have modes so that you can create and modify so that you can make things to attach to each other so that you can make one thing and if you want it to be a vehicle like a massive robot or something, then when you have made it you should be able to save it into your inventory so that you can put it in another map without doing it all again.
You should be able to put attachments on your weapons like you can on Brink that you can unlock instead of having the same gun on every map.
Should be able to have clans so you can go in a game with them without them being on your friends list.
You should be able to do what you want with your emblem like on black ops.
They should make it so that you can do what you want with your spartan or elite like you can do in halo 3
This isn't everything but please reply for more ideas for halo 4.
thanks, JMCooper20