There is a rumor floating around that Canon is testing an EOS-1 body with a 75+ MP sensor. We already know Canon has different megapixel prototype cameras out in the field with about 40 - 50 MP sensors. I find this story with little credibility and expect Canon to introduce their EOS-1Ds Mk III replacement some time next year with a megapixel camera of around 40+ MP sensor.
This is not to say Canon does not engage in research on sensors greater than 50+ MP but to have a 75+ MP prototype camera in some photographers' hands is extremely unlikely. There is a chance Canon may introduce the megapixel camera later this year but delivery will most likely be in early 2014.
I just got back from a Wildlife Photography shoot in the Arctic circle. It will take me a few days to get back to my regular routine and post some photos and catch up on some photography news. You can read my earlier synopsis of the trip here.