This is welcome news! I just posted a lengthy description of my experience shooting both the 5d3 and D800 on another thread, and since they were released I have considered switching entirely to the D800, but I'm willing to wait for Canons version of a Big Megapixel camera. These two cameras are similar in some ways, but so different in others, but when IQ is the top of the list more Megapixels wins. It gives you more options and more to work with, with better detail and of course cropping options are greatly improved. I'm not a fan of TC converters or zoom lenses so cropping is important to me. I have enjoyed the D800 for its big Megapixels, but miss the functionality of Canon, its AF system just to mention a few of the obvious attributes Canon brings to the table. Lets hope they learn something from the D800 and better it, unlike what happened with the EOS-M which was a disaster in my humble opinion. So I cheer at this rumor and will be in the cheering section.