Again I have no official confirmation, but the STRONG hint at the official EOS R press release, from the mouths of Canon themselves, was that the next (imminent, even) RF system camera is going to be an "s/R" style camera, not an "X/1" style camera. I think this is a hint that we can take to the bank.
Can you clarify what you say? What's s/R style camera? Lower spec camera?