All you Batman: Arkham City players need to start prepping to duke it out in the Dark Knight’s private sanctum – yes, the Batcave. The official Twitter feed of the game has confirmed that the Batcave will be available as a challenge map come 20 December, when it is bundled as part of some new DLC along with two previously available maps – Joker’s Carnival and The Iceberg Lounge. There is no word in pricing yet, but I think it’s reasonably safe it say shouldn’t won’t break the bank. To the Batcave, Robin!