A new Nikon Z APS-C mirrorless camera has been rumored for a while. I believe the new Z model will most likely come without an EVF and it should be announced in the next 2-3 months. DIYphotography recently published a very good mockup of what this new camera could look like:
A while back Nikon had a design patent for what the Nikon Z30 could look like (still not sure what the final camera model/name will be):
Reminder – there is also this Nikon concept camera that has not been announced yet (pictures credit: Nikon):