According to CR, Canon is working on C500 successor EOS C500 Mark II Cinema EOS camera. Report says that C500 Mark II will become the highest resolution video camera in the Cinema EOS lineup. It is suspect that it will match or slightly exceed 4.5K sensor as on Cinema EOS C700. There is a chance it will have a 6K sensor, but this is just a rumors.
2018 is the world cup & winter Olympic games year, according to CR, Canon is planning to update two new super telephoto prime lenses in this year. The focal length of these two new big white lenses is unknown yet.
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.