Also launching a system in the psat with a Zelda title seemed to pay off really well for them. Well that and some game called Wii Sports.
Depending on the NX's power level, or lack thereof, they could pull a Twilight princess and launch on both WiiU and NX at same time.
Possibly. But it would suck that the WiiU wouldn't get an exclusive Zelda game. Really the main reason I bought a WiiU is for a new Zelda adventure. If they co-release the next Zelda game for two systems, I would not want to play it in the inferior fashion. I would basically have to buy the new console to feed my cravings.
And let's speculate about what will make the NX so appealing. A fresh Zelda experience will certainly draw customers, but that alone won't make it a successful console. The Wii was successful because it was cheap and had a hook (motion controls). Previous Nintendo consoles sold exceptionally or adequately because they had some semblance of third party support. The NX will either have to be cheap + have a hook to sell like hotcakes as the Wii did, or the NX will have to powerful enough for third parties to easily port their popular games to (Call of Duty, Assassin's Creed, sports games, etc). Oh and they'll have to up their online features either way.