Along with soon to be announced Nikon Z30 APS-C Z-mount mirrorless camera, Nikon is also rumored to announce a new full frame Z-mount mirrorless camera later this year. Currently, there is no info about which full frame mirrorless camera will be announced, you can take a look at rumored Z-mount full frame mirrorless cameras below:
Nikon Z8 or Nikon Z7 III:
A long rumored high megapixel full frame Z-mount mirrorless camera to compete with Sony a7R V. Expected to be released in late 2022 to early 2023.
The replacement of Nikon Z6 II, rumored to feature with a new 30+MP full frame sensor, to compete with Canon EOS R6 & Sony a7 IV. Expected to be released in late 2022 to early 2023.
Nikon Z5 II or Nikon Z4:
A new entry-level full frame Z-mount mirrorless camera. The US price could be under $1,000. To compete with Canon EOS RP.