One Youtube user has uploaded almost two hours of gameplay footage for Batman: Arkham Origins. So If you don't want to be spoiled then stop now.
Batman: Arkham Origins features an expanded Gotham City and introduces an original prequel storyline occurring several years before the events of Batman: Arkham Asylum and Batman: Arkham City. Taking place before the rise of Gotham City's most dangerous villains and assassins, the game showcases a young, raw, unrefined Batman as he faces a defining moment in his early career as a crime fighter that sets his path to becoming the Dark Knight. As the story unfolds, witness identities being formed and key relationships being forged.