Surprise Surprise: Canon is working on a 8K Mirrorless camera, and the have also a schedule date of announcement. possibly in 2021. The Camera will arrive under Canon Mirrorless branding and currently no DSLR is planned to have 8K video recording capability.
Canon EOS R 8K Mirrorless Confirmation by Canon
Take a look what Canon representatives said in an interview
The sales performance of EOS R camera and RF lenses is almost in line with our original expectation.
We developed the EOS R System for the next 30 years, and started by introducing higher-end RF lenses. Yes, we are very serious about mirrorless. But please do not get the wrong impression, we will continue to enhance DSLR technology and products as well.
The typical development cycle for a camera is on the order of 18 months or thereabouts.
Video will play a huge role in the EOS R System for sure. For example, an 8K video capable camera is already in our EOS R-series roadmap. And we are not just looking at video from a camera perspective, we are also working on how to make RF lenses better for video capture as well.