Cortana also reports intruders on the ship. Covenant from the fleet outside his ship have invaded the vessel. There is no word on why the truce was broken in the 4 years Chief has been gone. Why the Covenant have come to Requiem, or how they even found it, remains a mystery to be discovered in November.
Cortana will have much more of an active role in this story. She has grown in her personality, choosing anew look for herself in the years Chief has been asleep. Things are not as they seem, however. Nearing the end of her seven year life-span, she is slowly drifting into madness. "Rampancy" affects all Smart AI's as they get closer to being seven years of age. This is accelerated by taking on more and more information. Since Cortana has absorbed information from both Halo and the Gravemind, she has already received more information than any AI has before. This has only accelerated her rampancy, and will make her a very unpredictable force in the game.
Will the Prometheans be the one to stop the Chief? Or will his closest companion be his undoing? Time will tell, but time is something Cortana may not have.
While we don't know exactly why the Covenant have broken the truce with Earth, we do know they are extremely interested in Requiem. They won't let humanity discover what the planet hides until they get their hands on it first. Covenant landing parties land in multiple places on the planet, and while you may have to avoid or kill them, they are not the predators in this jungle. Prometheans eliminate Covenant as much as they will humans.
All this slammed into one game? Yes please. But don't fret if it appears they are doing too much too soon.. Halo 4 is not the end, but merely the beginning of the Reclaimer Trilogy. Halo 5 and 6 will appear in the years to come, and we will get to see even more of the Universe we have come to love. Halo 4 releases Tuesday November 6th, 2012. Exclusively on Xbox 360