We should find out how many Wii U's Nintendo expects to sell in the next fiscal year to have a better idea of what the console's plan is after Holiday 2016.
And then we'll take that amount and cut it in half. Hasn't Nintendo's sales projections been overly optimistic over the last few years and they keep having to adjust them to be lower?
Regarding 3D Mario, considering Nintendo has not make a game in the style of 64 or Galaxy since Super Mario 3D Land came out I look at it as a sign that that template is what 3D Mario currently is. The Wii U got 3D Mario, just not perhaps in the manner that you would have preferred.
With Zelda I consider an NX release a given, the Wii U release is the one I could see not happening. But if it is a dual release like Twilight Princess I wonder what improvements the NX version will have. I got the Cube version of Twilight Princess primarily because I already had a Cube and wasn't interested in other Wii launch titles and it just made no sense to me to buy a whole new console for a game readily available on a console I already owned. Part of it was that the Wii version's key differences were the controls, which I was a iffy about anyway, and the world being flipped, and I figured since the game started on the Cube that that version had the world arranged as originally intended. I didn't just see any point in buying the Wii at launch but it sounded like the Cube version was the one to get anyway. It was a matter of personal preference with the Wii version not offering a clear advantage.
Now unlike the Wii/Cube situation the NX should provide clearly improved graphics over the Wii U. If it doesn't then there is a whole different problem here. Now will Zelda actually reflect that? I don't care about the Gamepad so any Wii U exclusive usage there wouldn't matter to me. But I don't usually like buying a console at launch and I only bought a Wii U last year so it would be nice to get some extra mileage out of it. I'll guess I'll have to wait and see.