The game's listing has disappeared from GameStop's online store, with multiple brick and mortar locations telling Shacknews that they can no longer accept pre-orders. nope
Employees assured us that existing pre-orders would be fulfilled upon the game's February 19 release, and suggested that GameStop has sold out of its initial shipment. The retailer is known to pull listings and halt pre-orders in such scenarios.
A supposed inside source told Kotaku that GameStop will not be selling the game because it supposedly requires the installation of Valve's digital distribution platform Steam. However, this seems extremely unlikely, as GameStop sells numerous other PC games that require Steam, including Valve's own The Orange Box and Left 4 Dead.
Then again, GameStop doesn't seem to stock Volition's just-released PC port of Saints Row 2, which required Steam to play, though it definitely sells the console iterations. And Saints Row 2 was published by THQ, just like Dawn of War 2.
Then again, GameStop is still listing Relic and THQ's other spring release, Company of Heroes: Tales of Valor, for pre-order. And if Dawn of War 2 ends up requiring Steam--its multiplayer beta is Steam exclusive--there's a fair chance Valor would too.
Shacknews has, of course, contacted GameStop for comment.