Outspoken Platinum Games designer Hideki Kamiya has told a fan on Twitter that if people really want Okami 2 then they need to speak to Capcom about it. Whether or not Platinum Games have an interest in developing the game remains to be seen. But if you want the game, then it’s probably best to let Capcom know via social media sites.
Ask Capcom. RT @ZeldaPrime: WiiU is to good for Okami 2! HD console and big touchscreen controller! Get on making Okami 2, Kamyia-san