Majestic Map Pack (February release timeframe)
Maps: Landfall, Monolith, Skyline
Description: Landfall’s emphasis is on infantry battles against a glittering ocean on a distant world, while Monolith exposes you to the naked vacuum of space – and the firepower of opposing teams, and Skyline’s distinctly industrial feel provides new challenges in somewhat familiar, but occasionally confined spaces.
Castle Map Pack (April release timeframe)
Maps: Daybreak, Outcast, Perdition
Description: 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.
Also included in the “Halo 4” War Games Map Pass are two unique in-game helmets (‘Scanner’ and ‘Strider’) that feature new geometry, and an exclusive in-game emblem (‘Falcon’). The “Halo 4” War Games Map Pass is included as part of the
Halo 4 Limited Edition.
Update:
I’ve uploaded some concept art to my Skydrive