At The Game Awards, 343 Industries announced that the second free update for Halo 5: Guardians will be available later this month. No specific date has been set.
The new free update, titled the Cartographer’s Gift, brings the new Forge mode, a new Warzone map (Battle of Noctus), a new Arena map (Overgrowth), two new Big Team Battle maps (Antifreeze and Burial Mounds), and more than 30 new REQs for items such as new armour, weapons for Warzone, and multiplayer emblems.
More free content for the game is planned for 2016.
Source: Xbox Wire
Halo 5: Guardians received its first free content last month with the introduction of the Big Team Battle playlist and maps.