An RF mount camera with an APS-C sensor has been long rumoured since the launch of the EOS R system. Canon themselves will neither confirm nor deny such a camera is coming, which means such a camera is coming.
I have been told twice recently that an APS-C sensor equipped RF mount camera is in the wild with a select group of photographers. One of the sources claims that the APS-C camera “looks nearly identical to the EOS R6”, which shouldn't be much of a surprise, I also expect specifications to be nearly identical as well. I get the feeling we're past the point of test mules being in the wild, so the R6 comparison is probably quite accurate.
I do think we'll see an “EOS R7” announced sometime in 2021.
More to come…