There have 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' (15-35mm, 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's not out of the realm of possibilities this could be at the heart of such a camera. However, there's also the chance it never makes it off the data sheet as well.

Update (April 23, 2019): As noted by CanonNews, it seems very likely this sensor could be either an old sensor that never came to fruition or possibly a sensor for industrial purposes. There are discrepancies between this leaked document and past documents, but nothing conclusive has pointed in any direction. The headline of this article has been edited to emphasize that this is merely a potential sensor we could see in the future, nothing definitive.