I saw on either B&H or Adorama that Nikon is going to ship on April 21, 2016.
Don
Here's hoping!
I am interested in this one. I plan to wait till refurbs become available which might be this time next year or later (barring a severe GAS attack). I'll be carefully following the testing and see if it really offers what I'm looking for. Different people will have different interests in this one. The high frame rate and large buffer don't interest me. But I can see how they would interest a sports photographer. I'm mostly interested in low noise high ISO performance for wildlife. It would have too be significantly better than my D5300 for that purpose.
I'll hang on to my D800 for landscape until it breaks or till D810s get so cheap I can't resist.