The Warzone Firefight title update expected for Halo 5: Guardians sometime this month will be the game's biggest revision yet, and while it isn't yet dated 343 Industries has pumped out a lot of info on what it will contain.
In addition to the titular PvE mode coming — it's a combination of Halo 5's Warzone and Halo 3: ODST's Firefight — the update will deliver new maps, a Campaign Score Attack mode, new weapon skins and achievements, new vehicles and armor, and a new canvas for Halo 5's Forge toolkit.
One of the new maps is Prospect, pictured below. It's set in a mining facility, which offers scaffolding for sniping positions and trench locations providing both cover and up-close action.
Tidal, pictured below, is the the Forge canvas, set in a coastal location.
The last update to Halo 5: Guardians was "Hog Wild" at the end of May, which added new vehicles and weapon modifications but no new maps, saving them for the Warzone Firefight update.