It sounds like Canon is getting a lot more serious about the RF mount now. With recently announcing an RF mount cinema camera, and the mostly positive response the EOS R5 and EOS R6 have received (from people who’ve actually bought them), it’s not surprising. But a post from Canon Rumors suggests that there are at least seven more bodies on the roadmap.
CR does say that these rumours come from multiple known and anonymous sources, and they’ve collated this all together into a single list. If true, or even if most of it is true, then it looks like Canon may be about to ditch both EF and EOS M mount systems.