On the Arkham City community forums, Rocksteady community manager Sarah Wellock answered key questions on how the New Game Plus feature will work in the game.
New Game Plus mode will be unlocked once players finish the game, allowing them to restart with all of the gadgets, upgrades and experience points earned from the first play-through. The game will be significantly harder the second time round, with tougher enemies at the beginning, new enemy locations, increased boss difficulty and the removal of counter icons from enemies.
There will be only one difficulty setting for New Game Plus, regardless of whether players first completed the game on the normal or hard setting.
The New Game Plus mode in Batman: Arkham City was first revealed by the leaked achievement list, which featured two achievements for completing the mode.
Batman: Arkham City will be available on Xbox 360, PlayStation 3 and PC from October 18 in North America and October 21 in Europe.
Watch the Batman: Arkham City 12 minute gameplay trailer below: