Iwata wants to satisfy Wii U owners "to the maximum extent possible".
Cross-over fighting game for 3DS was expected this autumn.
Nintendo won't drop Wii U and 3DS when NX launches.
"Link isn't the most masculine of guys in the world," says the game's director.
Also experience a special 30th anniversary section dedicated to Super Mario.
"It's just not the way we do things," says Reggie.