so this is basically the description released for the new game
Quote:
Batman: Arkham Origins features an expanded Gotham City and introduces an original prequel storyline set several years before the events of Batman: Arkham Asylum and Batman: Arkham City, the first two critically acclaimed games of the franchise. Taking place before the rise of Gotham City’s most dangerous criminals, the game showcases a young and 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, players will meet many important characters for the first time and forge key relationships.
and here is part of the plot
Quote:
The prequel takes place in an open world Gotham City environment, where 8 of the world’s deadliest assassins gather in Gotham on Christmas Eve under the direction of the Black Mask in a plot to kill Batman.
from the pictures revealed, one of these assassins appears to closely resemble Deathstroke. so it is very likely he will be in the next game. the identity of the other 7 assassins remains unknown