After the presentation of the new Canon cameras EOS R5 and EOS R6 you can find more informations and a short test of a pre-production model of the EOS R5 on DPReview. There is also a short video from Chris and Jordan about the two cameras. This all looks very promising. I hope that my new camera will actually be delivered at the end of this month.
By the way, another good news: Canon CPS members (at least in Germany) receive an EF-EOS R-Mount adapter for free when buying the EOS R5 or R6 and registering the new camera, see here.