Halo 3 Legendary Map Pack to be announced on Tuesday.
Published on
Says so on Bungie's site.
The already-revealed Ghost Town will be joined by a pair of other maps in Legendary, the first of which will actually be formally unveiled Tuesday– there’s one of those press releases announcing it and concrete details about the map’s release date and other sundry details. So, much to your chagrin, the wait is a few days longer.
There's some pics of new vehicles over there, should this float your boat.