D7200 is an excellent camera. Fantastic image quality and better AF than a D800.
However Thom Hogan thinks the D400 might finally appear in the first half of next year. I am sure I written that most years since 2009!
LOL...as an avid follower of Thom Hogan, I have also seen that "the world will end on..." prediction for the D400 year after year. It could be someone at Nikon is "punking" Thom. LOL
I have used a rental D7200 on the surface for wild life photography in Yellowstone and was very pleased with the focus speed and the image quality and improved hi ISO performance. It is lighter and smaller. Didn't fit my hands quite as nicely as my D300 and I missed some of the dedicated buttons.....only a few of those are issues once in a housing.