Rocksteady Games has confirmed it will release a second Batman: Arkham City DLC ahead of Christmas with the Batcave to be introduced.Batman: Arkham City fans are set to receive a pre-Christmas treat with the comic book spin-off gaming release to add the Batcave in a upcoming DLC set to launch prior to the December 25th festivities.Currently unavailable within the game, Batman\'s iconic and formidable lair is to be added within an imminent Arkham City downloadable content pack with the Batcave DLC being officially confirmed via developer Rocksteady Games.\"Brand new DLC coming December 20th with all new Batcave,\" the developer behind Batman: Arkham City announced via its official Twitter feed.Whilst no further information has been offered about the now eagerly awaited challenge map, Rocksteady Games proceeded to add through Twitter \"Jokers carnival and the iceberg lounge also available to download then!\"The second DLC to be confirmed for the recently released Batman: Arkham City title, the Batcave offering is to follow the Robin Bundle Pack which hit PS3 and Xbox recently adding the spandex suited sidekick and his fanciful array of gadgets to the crime fighting fray.