Warner Bros. has also released more information about the Deathstroke DLC:
Today, Warner Bros. Interactive Entertainment and DC Entertainment confirmed that Deathstroke will be a fully playable character in the challenge mode for Batman: Arkham Origins™. Fans who pre-order the game for Xbox 360® video game and entertainment system from Microsoft, PlayStation®3 system or Windows PC will receive exclusive early access to the Deathstroke pack.
Deathstroke will come complete with his own unique weapons and special moves, and will be playable in all challenge maps in the game, as well as two additional challenge maps that will be included with the pack. The pack will also contain two alternate Deathstroke character skins.
Batman: Arkham Origins will be released on October 25th for the Xbox 360, PlayStation 3, Wii U and PC.