Here is a new list of rumored specs of upcoming Canon EOS RS high-megapixel full frame mirrorless camera. This camera is rumored to be announced in February, 2020, ahead of CP+ Show in Japan.
According to latest rumors on CR, a pro/high-end mirrorless camera with both RF mount and EF mount is in the works. This means you will be able to mount both RF lenses and EF lenses without the use of an mount adapter. This would be a great news for Canon shooters.