Warthog, Inc. (Level)

Warthog, Inc. is a multiplayer map that was removed from the final version of Halo 3. The map has either been scrapped, will be featured as Downloadable Content via the Xbox Live Marketplace, or was renamed, or deleted.

Speculation
Due to the name, and the recent trailer, Arms Race, a lot of factory materials might be in the level. This also might be a "Watch where you step" level, considering the many machines working on the Warthogs and hot molten steel pouring everywhere. This might also be a Warthog training ground, where UNSC troops practice driving and shooting. It may feature a Warthog assembly line, but this is all only speculation. It is also theorised that Warthog Inc. may be an early Forge map-editor test. The map is rumored to be The Pit.

It doesn't appear in Halo 3 and appears to be, like Cyberdyne, a removed map.