If you're the kind to shop around retailer-exclusive bonus content, you may want to cast your eyes over the Batman: Arkham City skins on offer.
The dedicated fans over at ArkhamCity.co.uk are compiling a list of available player skins and where you can snaffle them.
One of the coolest is The Dark Knight Returns skin, featuring a bulky character model seemingly inspired by Frank Miller's much admired post-retirement Batman arc, which comes with all pre-orders of the Collector's Edition.
Another fairly awesome one is the suave Batman Beyond skin, available with pre-orders from GameStop in the UK and MightyApe in New Zealand. MightyApe is also offering an Earth One skin, which should please comic geeks deep enough to know what that means, and an Animated Series version. Lucky New Zealanders!
For the nostalgic, 1970's Batman sadly comes without a "na na na na na na na" refrain, but can be had with pre-orders at ShopTo in the UK and Toys 'R' Us in the US.
As previously noted, Robin is also getting a bit of bonus content love, with Best Buy in the US and JB Hifi in Australia offering a Red Robin skin.
Batman: Arkham City is due on PC, PlayStation 3 and Xbox 360 in October, with a Wii U version to follow.