Get a sneak peek at the maps in the next Halo 4 Map Pack, Castle Map Pack, coming out April 1st in this concept art.
According to IGN:
“Daybreak is set in a military facility against the backdrop of an idyllic mountain range, while Outcast plunges you into the warrens, canyons and arches of an alien edifice, and Perdition takes players into the heart of an urban sprawl, with tactical speed and situational awareness its key features.”
Daybreak
Outcast
Perdition
Source: HFFL – HaloFanForLife, IGN