Amazon are currently holding a pre-order incentive that unlocks a playable Deathstroke DLC along with $10 Amazon.com credit. There are no other details at present about the DLC and what it might contain. If it’s anything like the Catwomen DLC for Batman: Arkham City then it will unlock new parts of the story. That seems a bit far off though and will more then likely be a challenge mode of sorts. No official word yet on the DLC so we can only but wait.
There is a raising concern however about how quick preorder DLC is being announced for upcoming titles. What do you think about this?