Five DLC packs will be made available via this season pass.
http://www.nintendoworldreport.com/news/35532
The DLC Season Pass for Batman Arkham Origins has been confirmed for release alongside the main game on Wii U.
Available for $19.99 in North America, the Season Pass will provide access to five pieces of downloadable content. Two of the DLC packs will be single-player content; the first item, Arkham Origins Initiation, tells the story of Bruce Wayne's final trials before adopting the Batman guise, while the other will be a full campaign separate from the main storyline.
The remaining three pieces of DLC are skin packs - these include Gotham By Gaslight Batman and Brightest Day Batman, in addition to skins based on the New Millenium and Infinite Earths comic book series.
Batman Arkham Origins hits Wii U worldwide on October 25.