According to latest rumors by twitter user how2fly, Canon is currently testing the prototype of EOS R6 Mark II. The EOS R6 Mark II will feature with a stacked sensor, which is found in the Canon EOS R3.
As already rumored before, Canon is planning to announce a new RF mount full frame mirrorless camera to replace currently EOS R. Maybe this new camera is the Canon EOS R6 Mark II. Currently, there is no info about release date of Canon EOS R6 Mark II. Stay tuned for more info.
The prototype of the EOS R6 Mark II is already in testing, and it shares something with EOS R3: a STACKED sensor.
— how2fly (@camerainsider) August 31, 2022