The official website for Batman: Arkham City, the appropriately titled BatmanArkhamCity.com, has been updated with the first pre-order offers for those in the States.
GameStop has the “Joker’s Carnival” challenge map, which sounds pleasant. Additionally, Best Buy will be handing out “a combo pack” to go alongside reservations. I don’t know what that is, but it sounds less substantial than the aforementioned reward.
No images or hard details on either of these yet. I’m sure we’ll hear more from Warner Bros. soon enough.