Assassin's Creed 3's latest DLC, Battle Hardened, will eventually be released on the Wii U. We just don't know when.
The multiplayer DLC, which adds three new multiplayer maps and three new characters, was released earlier this week on Xbox 360. It will also be coming to PS3 and PC, but the date has not yet been announced.
Similarly, its arrival on Wii U was up in the air until a representative recently confirmed its eventual release on the Wii U. Speaking to Nintendo Everything, the representative said that they'll have "more information regarding a date once we get closer to the launch of the content."
Battle Hardened is currently priced at 800 Microsoft Points, but is free to those who already purchased the AC3 Season Pass.