At least THQ is staking an early claim on that "3/13/13" date. May we recommend the picturesque Hinesville, GA -- home of not one, not two, but three signers of the Declaration of Independence -- as a place on which to center the midnight launch proceedings? You'll really like the zip code tie-in.
Update: THQ sends a note that it has not yet officially announced a date for the title, and there is no more mention of 2013 on the official websites for THQ or the game itself. Unmark that calendar, we guess.