This article is too damned short, Marine! You will help Gruntipedia by so it will fit the screen, fool!
During the development of Halo Wars by Ensemble Studios, another three teams worked on other hopeless projects. One of these was the "Untitled Halo MMO", which seems to have sucked since the beginning.
While colorful pictures were produced, and Bungie planned to help Ensemble Studios on the game. All the teams that didn't work on Halo Wars got fired for "not helping the team" with Halo Wars. It is now abandoned like a orphan, or something like that.
The details of the game are unclear, though the colorful pictures show various new additions to the franchise such as the Elves, Giant Ostrich, Avian Claw, The Rapper Group, Cackler, David Hasselhoff, your mom, Peon and Thief.