Warthog, Inc. (Level)

Warthog, Inc. is a multiplayer map believed to be featured in Halo 3.

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. You might be able to expect many, MANY Warthogs and machine gun turrets. As well as grenades and human weapons, not limited to the Spartan Laser. But, this is truly speculation, and not at all proven.

Discovery
It was discovered in the recent Halo 3 ViDoc that was talking about multiplayer. A video analysis has expertly spotted the text "Map: Warthog Inc. Gametype: Escort" No information about it has been provided, and it has not been seen in either leaked or official material. However judging from it's name, it's likely the level will be set in a Warthog construction facility.