We're told that the next EOS 5D will come in three different versions. Two of the cameras named “EOS 5Ds” would be the high megapixel cameras with a resolution of 53mp. One of the cameras would have an AA filter and other would not. We've heard this sort of thing before, except the language used previously was one camera would have a low pass filter, and the other would not. I do like the naming “EOS 5Ds”, as that may finally put to rest the “EOS 3D” moniker which has been around longer than this site has. There is also precedent on the “S” naming from the days of the “EOS-1D” and “EOS-1DS”.
The third camera would be an EOS 5D Mark IV, which would continue on the path of a lower megapixel event, sports, wildlife focused full frame camera. If this is true, I don't believe all 3 cameras would come at the same time.
For the time being, there are no plans for a high resolution EOS-1 body style. However, expect the build quality of any 5D replacement to be top notch.
Personally, if they don't make a high resolution EOS-1D style body, I do hope that a “5Ds” has the top plate of an EOS-1D.
More to come…