Eh, I thought the same thing about Wii u and we know how that first year ended up.
A delayed Nintendo game is not exactly shocking news, and yes, we know HD development hit them hard (that's undoubtly their own fault, they should have known from the struggles of the first HD generation)
But this time, assuming NX comes out in late 2016, they're being quiet for quite longer - IIRC more or less 3 years instead of 2 for the Wii --> WiiU transition for Retro Studios and EAD/EPD Tokyo for example, and that's a LOT of time I think - and the unified environment/architecture should hugely ease slipping releases whenever they occur.
I'm cautiously optimistic, also because sooo many things went wrong with WiiU that you can hardly do worse than that.