The Nikon NIKKOR Z 100-400mm f/4.5-5.6 VR S Lens is now in stock at Adorama:
Update: the 100-400mm Z lens is now in stock also at Amazon:
This will not last long. Previously coverage of the 100-400mm Z lens can be found here:
Nikon released new firmware updates for the 24-120mm + 100-400mm Z lenses and the P1000 camera
Check also the Nikkor Z 100-400mm lens avaibility at: