The rumors about Canon EOS 5Ds and 5Ds R successor is coming, according to CR, Canon EOS 5Ds R Mark II will have a brand new 60.1MP full frame CMOS sensor, and will be able to shoot 4K video. The Mark II version will be amalgamated into one DSLR camera. And rumored release date will be in Q3 or Q4 of 2018, likely announced after EOS 7D Mark III and 90D.
After 6D Mark II (B&H Photo/Amazon/Adorama) officially announced, next main DSLR cameras to announce will be Canon EOS 7D Mark III and Canon EOS 90D. According to recently rumors on CR, the 7D Mark III and 90D could be announced in the first half of 2018, and EOS 90D will coming before EOS 7D Mark III.
Japanese webiste NokishitaCamera has posted the Japanese price and release date info of upcoming Canon EOS 6D Mark II and Canon EOS Rebel SL2 DSLR cameras. As rumored before, EOS 6D Mark II body will be priced $1,999 in US, shipping in August, 2017.