I have a feeling the D6 will be Nikon's last professional DSLR.
Which is fine as I think the pro level DSLRs have reached their maximum capabilities. The one major issue i have with mirrorless cameras is battery life. It plain sucks. I can get about 2500 shots on a single charge with my D5, and I have six batteries. I never run out of power. I can go through 3 batteries on the R5 in a single day. That’s crazy. Call me old fashioned, but I actually don’t like EVFs.