If NX hardware has been settled on then the R&D budget would have been incurred already, so those costs may not be valid going forward and thus Nintendo could profit off of other areas until NX releases and begins to add to the pile of cash.
Amiibo could get a bunch of new units, Zelda and some other surprise new games could release on Wii U and 3DS which Nintendo also expects to sell well and make them good profits.
Mobile software sales, F2P money from Project Treasure could also add to that money.
TBH though I think NX will be the fusion platform, a new home console that plays all of Nintendo's current games from Wii U and 3DS, with some of it's own that are unique enough and Nintendo expects that to cause a big spike in software sales to the point where it has a big effect on their profits.
If NX is Fusion then it will more than likely release next Fall.
