Deathstroke is one of seven assassins who pledges to kill the Dark Knight, kicking off the events of Batman: Arkham Origins.
At the moment the character is only available as a preorder bonus, but the wording of the publisher implies that the content will be available to everyone after a time, with the preorder merely giving early access.
Deathstroke will be playable in every challenge map in the game, and will also come with two additional challenge maps. It sounds like the playable character will be similar to the playable Joker in PS3 copies Batman: Arkham Asylum. Much like the playable Joker, Deathstroke will utilise a range of new weapons and gadgets that require the player to think of different approaches to the timed challenge maps. In addition to the challenge maps, Deathstroke’s pack will contain two skins for the assassin.
Batman: Arkham Origins is currently confirmed for release on Xbox 360, PS3, Wii U and Mac, with no next gen releases mentioned as of yet. The title will be available from October 25th.