The recently announced Sigma 70mm f/2.8 DG Macro Art lens for Canon EF mount will be available for pre-order tomorrow. According to Nokishita Camera, Japanese price for Sigma 70mm f/2.8 DG Macro Art lens is 59,400 yen. This means US price will be around $499. You can check price & pre-order option at B&H Photo Video.
Another mention about upcoming Canon full frame mirrorless cameras. Recently, Japanese website Nikkei has posted an article about upcoming Canon full frame mirrorless cameras, they bet that Canon full frame mirrorless cameras will be announced around Photokina 2018 in September, and release date in 2019.
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.