The biggest part of the update is the Big Team Battle, the 8v8 multiplayer, and vehicle heavy, mode. Along with Big Team Battle comes four Forge-based maps that have been created just for that mode (Microsoft will release the Forge map editor for Halo 5 in a future update).
Also included are 48 new REQs "including new armors, helmets, weapon skins, weapon and vehicle variants, a new visor and assassination, and new emblems." In addition, 343 Industries has fixed a few small bugs in the game.
Are you looking forward to playing in the Big Team Battle mode with this Halo 5 update? Let us know in the comments!
Source: Halo Waypoint