Lu yang (depending on the name is still a Chinese) is Nintendo's chief test engineer. He revealed on his LinkedIn resume page except for Nintendo's "the next generation (not announced) console".Lu Yang once worked in Microsoft as a software development engineer of Windows Phone.

His resume is written like this:

Nintendo

From February 2014 to the present (1 year and 3 months)

This generation (Wii U) and the next generation (not announced) console platform tool development

Nintendo has announced NX. I don't know if there is a mysterious hardware, or the NX has not yet been announced when the Lu yang was updated.