According to recently talk on CR, Canon will be also release their first high-end mirrorless camera in Q4 of 2018 as Nikon. The source didn’t said if this new mirrorless camera will be full frame, but Canon users likely won’t be ok with another APS-C mirrorless camera.
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.