It would make sense for NiN to delay both versions from a business perspective. If they launch Zelda on both consoles in March, with low initial production numbers of Switch, it will be sold out everywhere, which would lead to many Wii U owners, or hardcore Zelda fans, looking to get it on Wii U instead, while that console was still available on store shelves.
NiN would much rather stop production of Wii U late 2016, early 2017, let them completely sell out for good, then only have Switch available after March. This would allow NiN to show off what Switch can do over a six month period, hopefully enticing Wii U owners, and Zelda fans, to grab Zelda and Switch mid to late 2017 and completely leave behind the Wii U and move on.
The more Wii U owners that buy Zelda, the longer Wii U will need to be supported, and the longer NiN has to wait for those gamers to buy into next gen. If Zelda is as massive as they say it is, those Wii U owners may hold off on Switch for quite a long time.
With a new hybrid type of console, and new system architecture, NiN is going to want to drop the Wii brand asap and move forward. With Nvidia talking about their close partnership, and bright outlook into the future, this looks to be NiN's PS4/XB1. Custom compatible Tegra chips in each new device from now on.
It makes so much sense for NiN to just say, lets do what needs to be done to leave last gen behind, and focus on this gen, and pump out quality games like there's no tomorrow and don't look back (until the next old skool mini console needs to be released, because ya know...) With the right hardware, at the right price, and constant quality games, most fans will forgive NiN knowing the game plan going forward and will Switch.
