I guess many of us were waiting for this: the possibility to use Sigma's excellent…
Unreleased Canon Camera And Accessory Show Up At Certification Authority
Don’t get too excited. We think that most likely this is the upcoming Canon EOS R5.
Nokishita spotted a yet unreleased Canon camera and an accessory as they were registered at a wireless certification authority. The camera accessory has the reference DS586224 and the camera has DS126839. he accessory might be a new flash unit.