Nintendo is in a bad spot with the Wii U right now. I LOVE Nintendo and even I can admit that they are in a very bad situation. I absolutey cannot believe that the Wii U sales are stillas low as they are but the facts are the facts and with the PS4 and the XBONe now competing with it the future doesnt look any brighter. The question really comes down to whats to blame for this and from what I can gather it is a lack of marketing and a clear public image. Apparently there are STILL people who have no idea Nintendo has released a new console and a large part of that has to do with the name of the system.
So what I think is the best course of action is to just bite the bullet and rebrand everything. Recall all the Wii Us they can, paint a 2 over the U slap them in a new box and rebrand it as the Wii 2. Launch a huge marketing campaign making it clear to the consumer that the Wii U is a brand new Nintendo system and pack in the updated Wii Sports and a Mario game.