What is D300s successor and what is not

OK, thanks.

I calculated all possible progressive steps in the variant the high-end DX will finish.

1. sell DX lenses, D300 and buy D800 (or better fast D700 successor) + FX lenses which have center-edge sharpness

2. sell all Nikon equipment and switch to Canon FF (Canon APS-C is not the way if Nikon DX would not be the way)

3. sell all Nikon equipment and buy m4/3 equvalents

4. sell all Nikon equipment and buy Pentax or Sony equvalents of the same image and power quality

And the results: 1. or 2. or 3. = too much money investment and no gain for my photos, 4. does not exist.