According to the PlayStation.Blog, early copies of the game (marked with a special sticker) will include a code that unlocks Sackboy as a playable racer. Both pre-ordered copies and first-run copies purchased at retail will feature the bonus.
Sony seems very eager to encourage pre-orders for the upcoming racer, as Sackboy is just the latest addition to an extensive pre-order bonus campaign. Has the tactic worked, or are you still on the fence? Check out a new trailer (featuring Sackboy!) after the break.