THQ had given us a time frame now. While it is seems like it is far away, I for one want it to turn our right, so I can wait. However, March is the latest they say it will come out (not counting delays), so it is possible to see it as early as april 2012. Here is the official announcement.
It looks like March 2013 is the latest expected delivery date for THQ's Warhammer 40,000: Dark Millennium Online MMORPG. Rock, Paper Shotgun reports that THQ told its investors the sci-fi opus should see the light of day in the fiscal year 2013, a period stretching from April 2012 to March 2013.
While news of the far-future setting has excited some fans, others are put off by rumors that the extensive faction roster from the source material is being distilled to a more MMO-palatable pair of opposing organizations. However it turns out, we'll have to wait quite a while it seems and content ourselves with the slow trickle of WAR40K news.