...OK, will take 1$.
Since a lot of OP are on the fence regarding which camera to get, more MP or faster shutter speeds, here is an idea for Canon to consider right now, with the Canon FF lineup.
1 - Canon 5D Mark III - keep it as it is, has high MP and video for whoever wants video in DSLR body.
2 - Canon 1DX - remove the video but keep the high ISO, fast shutter, 18MP and name it SPORT as "Canon 1DX-SPORT"
3 - Canon 1DX - remove the video and add the sensor from 5D Mark III to make it 22MP and name it STUDIO as "Canon 1DX-STUDIO".
In this way would be a lot easier for many OP to choose a body based on preferences as video, action/sports or studio/landscape, in a 1D body or regular style.
How many agree or not, wonder if anybody would sent this link to Canon to see it...