According to the latest rumours, the Canon EOS R6 is to be presented in July - until now, a date in May had been assumed. According to rumors the Canon EOS R6 should have a 20 megapixel full frame CMOS sensor and be able to capture 4K video at 60 frames per second and FullHD at 120 fps. There is a dual card slot for the recording media - we assume that Canon combines a CFexpress and an SD UHS-II slot for a wide range of storage media here, as it did at EOS R5.
Furthermore, there should not be a top-down display (??) and the viewfinder will have a lower resolution than that of the EOS R5 - likewise, the quality of the body should not come close to that of the R5. It should be able to take 12 pictures at full resolution per second (i.e. 5,152 × 3,864 pixels) using a mechanical shutter and 20 fps using an electronic shutter.
Canon EOS R5
It will probably have an IBIS (In Body Image Stabilisation) 5-axis image stabiliser, as already announced for the EOS R5 - i.e. for the first time a new type of in-camera IBIS image stabilisation in combination with a stabilisation system for the lens.
It seems that Canon is positioning the EOS R6 as the slightly cheaper camera compared to the R5, which uses a lower resolution (4K instead of 8K) but has a higher image dynamic range due to the larger sensor/photodiodes.
The delivery of the EOS R6 should start in late summer/autumn - if it is not delayed due to corona.