Three different map packs are planned for Halo 4, which will include the Crimson Map Pack, the Majestic Map Pack and the Castle Map Pack. These map packs are also included in Halo 4’s Season Pass, which you can purchase for the one-time payment of 2000 Microsoft Points.
343 Industries is yet to officially announce the release dates for the map packs. However according to an ad spotted on the German Xbox 360 Dashboard, the map packs may probably release on the following dates:
– Crimson Map Pack: December 10
– Majestic Map Pack: February 25
– Castle Map Pack: April 1
343 Industries has yet to comment on this ad which might have been released a tad sooner than expected.