According to several images of the box art and promotional materials available for Batman Arkham Origins game, when you take a closer look at the Wii U version of the game, there is no Deathstroke DLC sticker. Even the press release itself fails to include the Wii U as a supported platform for the DLC. There is no official word from Warner Brothers, so this should be taken as a rumor for now.
Look for Batman Arkham Origins later this year for all major platforms.
