You come seeking DLC and salty ol' pirates eh?
Assassin's Creed IV: Black Flag on the Wii U will not be getting DLC support.
In the announcement for the Assassin's Creed IV Season Pass, the Wii U was not mentioned. After contacting PR representatives, Gamereactor Germany confirmed its absence.
The Season Pass includes an additional three hours of gameplay in a new single player story, along with multiplayer characters and the "Kracken Ship Pack." The Wii U version of Black Flag releases on November 22 in Europe and November 29 in North America.