Just keep it as NX. It has a nice ring to it.
But I'm still betting on Nintendo 7.
I don't think the Color TV series counts as a home console any more than the Game and Watch series counts as a handheld console. Heck, it didn't even make it out of Japan.Wouldn't it be "Nintendo 8?"
1 -Color TV
2 -NES
3 -SNES
4 -N64
5 -GCN
6 -Wii
7 -WiiU
8 -??? (NX)