This is the first picture of the upcoming Nikon Z8, leaked at NR.
From the image, the appearance of Nikon Z8 is very similar to the current Nikon Z9 in terms of the design around the viewfinder, giving it a fearless impression. The area around the grip and shutter button seems to be almost the same as Nikon Z9, but the left shoulder, where the four-leaf button was on Nikon Z9, has a flat shape, which makes it wonder what the operation part is like.
See also Nikon Z mount Lens roadmap 2023