"Occasional Nintendo Life contributor Liam Robertson has passed us some information from a source that has access to prototype hardware for the 'NX'. They've advised that the images 'aren't legit', and we're certainly inclined to have faith in that source. Of course, as is the nature with rumours they are all to be taken with a grain of salt."
From http://www.nintendolife.com/news/2016/03/rumour_new_nintendo_nx_controller_images_surface_and_set_the_web_alight
No idea if this guy is talking rubbish, who knows.