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.
Three player co-op, Zelda, puzzles. What could go wrong?
Fire Emblem's Roy and Ryu join Mother 3's Lucas as latest additions.