The release date of this game is "When it's done".
Will it ever come out? I should have put this in the Funny section.
From their site: No, you cannot pre-order the game. If you see some online store saying "We are taking pre-orders", they're just trying to get your money (they usually also make up their own supposed "insider release date info", too).
There is no release date set, we are not taking pre-orders for the game. End of story.