Zombi U didn't sell as well as Ubi Soft wanted and Wii U hardware sales were weak for Decmeber 2012, that spooked Ubi Soft, but seriously Rayman isn't making a big difference had it been released in Feburary/March versus August/September.
It's a niche title and even kids don't seem to be interested in playing "cartoony" platfomer/action games (see: Puppeteer bombing, W101 bombing, etc.). Nintendo's established IP can weather the storm because they have long established fanbases to bank on, but everyone else is screwed.







