Call of Duty: Black Ops II launched for Wii U in November 2012. Nearly two years later, the game has received a new map.
Nuketown 2025 has been out on other platforms for a very, very long time. Just recently though, it seems that the content finally came to Wii U. Players can obtain Nuketown 2025 by installing an update on their console.
Thanks to Jake for the tip.