There is a good chance that the new Nikon D850 DSLR camera will be officially announced on August 16th (±1 day depending on your time zone). This is based on the date listed on the cover of the Chinese presentation slides that leaked earlier today. This could also be the time of the scheduled internal presentation and the actual announcement could be at a later date.
I will try to confirm the exact D850 announcement date in the next few days.
Just a reminder that all of the already existing Nikon events are scheduled after August 16th: