A Microsoft ExpertZone quiz has revealed new Halo 4 details.
According to the presentation, the game will include ten new weapons, two new vehicles (“plus many of your favorites from the past”, new enemies (the Prometheans and “an ancient evil”), and Spartan Ops will amass fifty missions over the span of ten weeks (amounts to “up to 12 hours” of additional gameplay).
Find screen caps of the slides at the Little English Halo Blog.