One of the places I read this is:
https://www.dpreview.com/reviews/nikon-z7-first-impressions-review/2
Hopefully fake news...
Same here, would be a real impediment for me personally.
Sadly the company also says that it won't be sharing the technical details of the mount, preferring to protect sales of its own lenses at the expense of creating of a more inviting, wider ecosystem. So, unlike Micro Four Thirds and Sony E-Mount, third-party makers will have to reverse-engineer the Z mount.
Attached an overview of my current lens lineup for the a7RII:
- Voigtlander 15/4.5 FE, would like to see the 10, 12 and 15mm versions in the Zee mount
- Sony Zeiss 35/1.4 FE, though I'm a big fan of 1.2 and 1.4 lenses the Z35.1.8 should do for now
- Nikkor 50/1.2, can be adapted with the FTZ adapter or a Leica M adapter (split adapters)
- Canon 85/1.2 FD, also with split adapter so can be adapted with a dumb Leica M adapter which should be cheap and available soon
- Voigtlander 125/2.5 APO EF using an electronic Metabones adapter, the fully electronic Canon EF version should make it future proof for mirrorless use IF an electronic adapter becomes available