Dude, they've been working on this since the day halo 3 was finished. Even whilst bungie where making Reach they where making this.
The problem is, they just couldnt be ****** to add all of the old gametypes. And I ******* miss both one flag and assault!
I mean, halo 4's a good game, fantastic graphics and gameplay. It plays like a piece of genius and is pretty epic, but the story and lack of decent gametypes really was a serious let down...
Oh well. BRING ME BACK MY ASSAULT GODDAMMIT xD