The Nikon Z7 II and the Nikon Z6 II are going to be released this year. They didn't change a whole lot from the previous versions.
Nikon ZFc Review: A Beautiful Disappointment of a Camera
Full review: The 2018 Nikon Z7 and Z 24-70/4 – Ming Thein
Nikon Z7 Review
Full review: The 2018 Nikon Z7 and Z 24-70/4 – Ming Thein
Nikon Z6 II Review & Sample Images by Ken Rockwell
Sadly, The Nikon Z6 II and Nikon Z7 II Aren't Innovative
Nikon Z6 II Review & Sample Images by Ken Rockwell
Which is better, the new Nikon Z5 or the Nikon Z6 (refurb)? - Quora
Atomos is working on a Ninja V update to bring 12-bit 4K/30p ProRes RAW to Nikon Z6 II, Z7 II cameras: Digital Photography Review
nikon z7 Archives - The Phoblographer
Equipment Review: Nikon Z7 » Michael Clark Photography
Nikon Z System News and Commentary
Nikon Z6 II and Z7 II: what you need to know: Digital Photography Review
Updated rumored Nikon Z6s and Z7s camera specifications - Nikon Rumors