https://www.techradar.com/news/canon-will-announce-a-full-frame-mirrorless-camera-this-year

We'll likely see a Canon full-frame mirrorless camera before the end of this year, according to a new report. 

It's previously been rumored that Canon will announce its first full-frame mirrorless camera at Photokina, the camera industry's big trade show, in September, or early in 2019.