My D750 has gone back as it had a damaged sensor. The shop (CEX) took it back and gave me a credit voucher, however I looked around and the quality of camera equipment they take in is shocking, so I probably won't be buying another from there so soon.
The question is, I am very happy with my D500s for the vast majority of things I shoot and prefer using them over the D750. I need to get another body in the not too distant future and want an FX, but I can't decide whether to get another D750 or to get a temporary camera and see what happens next year. When I start looking at older cameras (D700, D800 etc) I keep upping the price and coming back to the D750, but if I do that I won't be able to get a replacement should it come out. What is the likelihood of the D750 or D810 being replaced next year?