Why do people think the next Zelda will be on NX?

[zippy]

http://uk.ign.com/articles/2015/06/16/e3-2015-the-legend-of-zelda-still-coming-to-wii-u
Miyamoto has told us all it's still coming to Wii U, that's more of a definate than it coming to NX, we only know that Nintendo will talk NX next year but it still isnt confirmed its going to be released.