It seems it wasn’t that sure Nikon would announce their first full frame mirrorless camera in a few days.
Nikon Rumors clarified that
[…] the July 23rd date is just one of the rumored details I have reported about the upcoming Nikon mirrorless camera […] I have not seen the usual signs that precede a typical Nikon announcement and I am not sure if the official announcement will take place next week.
At the end, it’s likely we have to wait some more time. However, some specifications attributed to Nikon’s full frame mirrorless camera have already leaked,
To see all rumors about Canon’s full frame mirrorless camera click here.