Well as everyone guess chaos were being held back for an expansion back.

The next chapter in the critically acclaimed RTS, Dawn of War II...
THQ today announced Warhammer® 40,000™: Dawn of War® II – Chaos Rising™, the next standalone chapter in the critically acclaimed RTS series, is scheduled for release on Games For Windows LIVE in spring 2010.

Set in the grim, war-ravaged world of Games Workshop’s vast Warhammer 40,000 science fiction universe, Warhammer 40,000: Dawn of War II – Chaos Rising transports you into the midst of an intergalactic war between ancient enemies.

Continue the single player campaign from the original Dawn of War II with all new Wargear and a level cap raise from 20 to 30 for your Blood Raven squad. Veterans of the Dawn of War II single player campaign can use their existing squads’ accumulated wargear, abilities and experience to battle the traitorous Chaos Space Marines of the Black Legion throughout 20 new missions. Powerful new Chaos-tainted wargear can also be equipped and used against your enemy, but doing so could lead to dreadful consequences.

The Chaos Space Marines will also be playable as a brand new army in multiplayer. Other multiplayer additions include new units for Orks, Eldar, Tyranids and Space Marines, as well as new multiplayer maps.

As with the normal THQ expansion it includes some new units for old races, a new campaign and a new race. Although this time it looks like THQ listened to some of the complaints for the last game and has included more variety in the campaign as well as the new corruption mechanic.

With this and the last stand update coming DoW 2 might see some new life