At WWDC 2019, Canon shows off their unreleased 8K cinema EOS camera for 8K capture. This camera was used to capture 4:4:4 ProRes 8K RAW. As already rumored before, this camera could be upcoming Canon Cinema EOS C300 Mark III.
Imaging-Resource has published a new interview with Canon Executive, taking about the Canon EOS R full frame mirrorless system. Canon Executive said that 8K video capable EOS R camera is already in the roadmap, which means this camera will coming in next several years.