Leica0Series
Well-known
What we have to remind ourselves here is that the creator of this image states it is a mock-up, not a real camera. He has posted several other images, some showing the full top, and some with lenses mounted for comparison (Z and F/FTZ). Even a couple with rewind cranks (miniature generator for when the battery dies?).
His later images delete the crank, but it shows he is just putting things together to get an idea of what Nikon might come out with. None of it is official, but is generating a lot of comments which hopefully Nikon will take into consideration.
PF
Like many others on the Nikonrumors thread, you are confusing the initial leaked image, from an anonymous source who says it is real, with the later mock-ups showing what such a camera might look like with Z mount and F mount lenses attached (pretty clunky). The initial image is purported to be real.