The latest patch for the Wii U version of Call of Duty: Black Ops 2 appears to be causing new problems as it fixes old ones.
Activision and Treyarch have acknowledged the issues and released the following statement in the official community forum:
Hello Wii U Community,
We are noticing some issues with the version of the patch that was posted that you guys are also reporting here on the forums. We are working with Nintendo on a resolution to this problem and hope to know more at some point tomorrow. I will keep you posted as I receive more information.
We are aware that some of the menu listings from the 360’s Revolution DLC drop are showing up in the game. This is not a confirmation of DLC for the Wii U, just a versioning problem that we are working to address.
The animation glitches are happening when different regions are connecting with each other. This is a versioning issue we are currently working with Nintendo to resolve.
I do not want to publish the list of known fixes until I have confirmation that they are all live. I hope to be able to do this tomorrow, but as I mentioned, this is something we are working on with Nintendo, so the timeline isn’t entirely in our hands.
Thank you for understanding.
With no timetable set for a possible fix, users who have updated their games will just have to deal with the new problems for now.
Source: Nintendo Everything