Here is info on the latest patch I believe. It says it is the fix for the 1st patch as said in article.
http://mynintendonews.com/2013/02/03/call-of-duty-black-ops-2-wii-u-patch-detailed/
http://mynintendonews.com/2013/02/03/call-of-duty-black-ops-2-wii-u-patch-detailed/