Set for a 2012 release on the Xbox 360 and being developed by 343 Industries, Halo 4 sees the return of Master Chief John-117 and Cortana in the beginning of a new trilogy. Set after the events of Halo 3, John must face an ancient evil that threatens the fate of the universe.
You can check out the teaser trailer here or below.
So, who wants to take bets on this ancient evil either being the Precursors or Forerunners and that this storyline will tie into the "Forerunner Saga" of novels being written by Greg Bear? I bet on the Precursors simply because ancient threats predictably never stay dead, and they're the most ancient species we know of in the Halo universe.
I also don't recall John going into cryo-sleep with a Jet Pack, so hopefully that was done for dramatic effect. Yes, I know, I'm nit-picking again.