: " It is 2555, more than two years after the Master Chief went
: missing-in-action following a decisive conflict on Installation 00—the
: massive, extragalactic Forerunner construct known as the Ark—as part of
: the final chapter in humanity’s bloody thirty-year struggle against the
: overwhelming forces of the Covenant. Now, as a tenuous peace exists
: between the humans and the Elites, a startling scientific discovery is
: made…and the riddle behind its Forerunner origins could very well seal the
: fate of the entire galaxy within a matter of weeks. In order to unravel
: these dangerous secrets, a heroic, hastily formed coalition of humans and
: Elites must attempt to overcome their differences as they embark on a
: covert mission back to the Ark—an astonishing, enigmatic place beyond
: comprehension from which few have returned and where mortal danger awaits
: them all…

: All aboard! The train to Hypeville is now boarding.

There have to be a couple Brutes still hanging out on the Ark. Like 3 or 4, there don't have to be a lot.