Batman Arkham Origins is set to arrive in October, and the contents of the first DLC has already been announced. The Initiation DLC will follow Bruce Wayne to Asia as he trains with Ra’s al Ghul and the League of Assassins. Keep in mind that this flashback means that Bruce isn’t Batman yet, just a ninja in training. It will be an interesting look into how the League shaped the Bat. At least for the Arkham series of games.
This DLC will also be included in the Arkham Origins Season Pass, which should include several other pieces of DLC.
The main game will also apparently include a proper hardcore difficulty known as I Am The Night Mode. It features no saves and only one life for the entire game. Sounds like lots of fun and a great challenge for gamers who say that games today are too easy.