I wouldn't be surprised if it turned out Namco Bandai really was the publisher. There's no way Ubisoft would make another one. They said Watch Dogs was the last, and with the way they screwed the sales, Ubisoft seems determined not to develop for Wii U again. But if Nintendo was pleased enough and wants another ZombiU game, there's no reason Ubisoft wouldn't sell them the IP, seeing as it's tailored for Wii U. Nintendo could then outsource development to someone who would actually care enough. The first got about 3/4 of a million sales, so a sequel could be an easy million seller. If this happens, expect the second game to be very different from the first.