The screenshots reproduced above appeared on the Flickr page of user yourichurkoff and are generally believed to be legitimate. Two multiplayer modes, King of the Hill and Guardian, can be seen in action on the map.
The screenshots have sparked speculation that the map is downloadable content set to be released in the future.
Microsoft has not commented on the screenshots. However, as the original game offered DLC multiplayer maps, and the sequel was part of a new generation of games to ship with DLC in the box, downloadable expansions to Gears of War 2 are expected.