Ya that's I think it's Onyx A.K.A. Sigma 7. If you look on the halo reach easter egg on the last level where it shows the spartan in the cryo tube, the armor looks kinda blue?
I read a rumor for halo 4 and someone said that the planet the chief lands on has other spartans on it. maybe its onyx. but other people think it's reach.
Here's a good idea. They should put an option in the game that would benefit people who love aa's and people who don't. The option should be to enable your player to use AA's and for them not to.
So people, tell me, what are you more excited for? Halo 4 or Halo CEA? I know they have like a year before release date but I am personally more excited for CEA.