One issue the series and fans are going to run into with the next Zelda is likely expectations. The way the Wii U situation played out and pushing a new console they were given well over 5 years to create and continue to improve on this game while they were delaying it for the new console. Now granted having a lot of the engine and assets done will speed up future development of the next title if they seek a similar game-style (which I assume they will), but they are gonna be hard pressed to have to not only achieve the depth of this game, but exceed it, in roughly half the development time they got for this title. Not to mention the cost of such a long development time. Nintendo was willing to eat that cost because they needed such a killer title to push new hardware. Remove that willingness to dump as much cost and the leniency of development time and its gonna be hard to live up. This is no unique problem to Nintendo, you see this situation play out all across gaming. Sadly business situations can both help, and hurt.