Where is the successor to the original EOS R?

Oh, let's be honest and dispense with any vagaries: all of these cameras are niche products. There's a sports niche and a pro niche and a video niche and a resolution niche. Niche in the way I used it was not to imply it was a niche product and others weren't, it was more in terms of the market segment.

I don't see Canon replacing the camera. Like others have said, the R was a camera to help Canon quickly enter the mirrorless market.

Quickly? Find me one single person that believes Canon (Canon!) entered the full frame ILC market "quickly". How long had the 5DIV sensor been around? Years. How long does it take to develop an entirely new mount? Years.

Is it your contention that RF lenses were being designed (years) and an RF mount was being designed and suddenly one day someone went to the camera engineers and said "here, we have this new mount and these new lenses and need a body in six months"?

Canon waited FIVE YEARS after the release of the Sony a7 to release their own FF ILC. Please explain to me how they "quickly entere[ed] the mirrorless market."

Totally misunderstood my comment and those of others here. Everyone knows Caon was WAY TOO LATE entering the mirrorless market. When Canon finally woke up and realized they were in deep trouble they quickly scrambled together a camera to enter the market. As BirdShooter7 mentions the initial camera was pretty much a disaster and took several firmware updates to get it working right.

You can pontificate all you want. I would easily put money on the fact there will never be an R replacement. The camera was a one off. Now Canon has an RF plan. Canon will replace the RP with a little higher end model and that will be the lower price FF offering. I could be wrong but I don't think I am based on my Canon experience. Shooting Canon cameras since 1981, EOS since early 90's and Canon digitals since 2000.

I don't work for Canon and have know knowledge of their plans. The R7 is exactly what I thought it would be, except I had figured Canon would developed a new sensor.

I personally do not see any replacement coming from Canon in the R niche. I do think Canon will replace the RP

Just as much a niche camera as the R. Your varying standards for these two is baffling. The low cost, entry point niche.

with a new low cost FF RF camera that will be the new offering for those who want a lower priced FF option. I see the new camera as the RF 6Dx replacement. I believe the camera will be an upscaled RP, but R users will be disappointed in the offering.

The RP is already the 6DII replacement. It uses the exact same sensor. Of course R users would be disappointed because sensor performance of the RP is both low resolution and low dynamic range even by 2019 standards when it was released.

Hopefully the new RP will have a new advanced sensor, not a retread like the R, RP, R7.

Why would any RP/6D NOT have a retread? It's the budget body. Of course it's going to have an old sensor. That's what makes it cheap.

I have zero doubt when Canon updates their sub $2K FF there will be only one model. You are welcome to believe what you want. Since this is all pretty much useless speculation I have said my piece.