Wii U has sold more than Xbox One, which means more potential customers, but the main problem is that, it seems like Nintendo customers mainly buy 1st party, and 3rd parties give us incomplete ports. This is why some if not a lot of Nintendo's customers buy more 1st party games. Lets say they make it for the U, if they advertise it on the E-shop and mabye Miiverse, it could be a big hit.