is the cover story for Game Informer
's May issue, and details
have started appearing online:
Halo 4 is set in 2557 - four years, seven months and ten days since the [Forward Unto Dawn] was split into two and the finale of the events of Halo 3.
Cortana impending rampancy will be a critical theme as will be exploring Master Chief as a person.
Cortana has chosen a new visual identity whilst the Chief has been sleeping.
The Covenant, at least Elites and Grunts, return but are not the primary enemy.
The [Forward Unto Dawn] eventually crash lands on Requiem, a planet enclosed in a massive Dyson Shell.
The UNSC is deployed on a top scret mission into deep space but will cross paths with the Master Chief during the campaign.
In the beginning, Cortana wakes up Chief because there is an intruder in the [Forward Unto Dawn].
See the link for information regarding the new co-op and multiplayer modes. IGN is saying
that the invaders onboard the Forward Unto Dawn
are Covenant and that they've broken the truce with humanity, but I don't see anything in the NeoGAF post to suggest that peace has failed.