LET ME INSIST...
H.D.R. multiexposure is a must nowadays (even some snapshot cameras do it) & REFLEX too. K-5D ie.
More resolution, no less than 36mpx.
100% viewfinder! with an eyepiece shutter like elder film cameras A-1, F-1, eos1... IS IT SO DIFFICULT, again!??
Improved autofocus (all CT) even being only 15... and faster! and placed other way in example: 4 of them in Rule of Thirds strongest points.
Don't put a movil, rotating, variangle, etc. screen like newer models (most of us Hate it)
CF card cover, lock device please (it opens on and on accidentally in 5Ds)
Pro-photographers are waiting for a tull not for a toy (prosumer market) think about it...
I'm just voicing my support for an eyepiece shutter as well, for the price Canon will charge the 5D Mk.III they might as well do it, and even on lower end cameras.