Canon is working on a 63MP full-frame sensor according to leaked data sheet
(Digital Photography Review)

There`s been rumors of a high-resolution EOS R camera since the EOS R was first released last year, but a leaked data sheet detailing a new 63-megapixel full frame CMOS sensor is the best hint yet that a mirrorless 5DS equivalent might be right around the corner. According to the leaked data sheet, the sensor - referred to as 35MM63MXSCD - features Canon`s Dual Pixel AF and 63 million effective 3.7nm pixels (9696 x 6464). Using the 16 channel digital signal outputs, the data sheet says the sensor should be capable of up to 5.2 fps at 12-bit. Below is the data sheet and a collection of leaked illustrations showing the various specs and schematics of the 35MM63MXSCD sensor: Canon has been teasing in interviews that it`s excited to make cameras capable of showing off the quality and performance of its latest lenses, including its impending `holy trinity` (16-35mm, 24-70mm and 70-200mm). Combined with the ongoing rumors churning around the mill that the next EOS R would be a high-resolution model due out sometime this year, it seems pretty clear this will be at the heart of the camera whenever it is released.