it is difficult for developeur to propose a WiiU release in the same time as the xbox and ps4 version because the Wii U is a generation behind and so the game will not be the same
Wii U is on pace to sell Dreamcast numbers. Nintendo should be more worried than their fans. We still get Mario Kart, Smash Bros, X, Bayonetta 2 , and Zelda regardless if the Wii U sells ten million units or fifty million units.
the question is why the sell of WiiU are bad and thos of the Wii since it lunched was very good, after all the wii U brings a lot of new things