One of the most talked-about future EOS R camera bodies is the RF mount replacement for the EOS 5DS and EOS 5DS R cameras. Which means a lot more megapixels than the 45mp of the Canon EOS R5.
We're naming the camera ‘R5s' for now.
I have been told that again, a small group of photographers have the high-megapixel body in their hands as it's going through the first phase of testing as a finished product. This source claims that the new sensor is “around 90mp”, which would be quite the bump in resolution over the EOS R5, and would put the cameras into two completely different segments.
Beyond the increased megapixels, I was also told that the EVF will be larger and higher resolution than the EOS R5.
I wasn't told when we could expect to see this camera announced, and I wouldn't be surprised if Canon doesn't yet know either. They are going to have to remedy the production quantity issues for both the EOS R5 and EOS R6 first.