Buying Wii U now, or wait for NX?

[midrange]

Wait for news. The wii u has solid titles, but nothing generation defining for you to spend $300.

I doubt the NX will have BC due to PowerPC->x86-64 architecture, but it's possible.

Also, most of the great wii u games will probably have sequels on the NX anyway (pikmin 4, smash, mario kart, legend of Zelda, donkey kong country, actual 3d mario)