Wish list?
-5D series body size with 1D series construction and weatherproofing;
-FF, of course, with 100% viewfinder coverage. Resolution is just fine on the 5D II;
-
MIRROR UP LEVER, PLEASE!-Options to customize, much as you would a car. Me, I'd opt for no video, WiFi, GPS, etc., for example;
-Simplified interface. Right now there are too many buttons and things buried in Custom Function. Look at the Leica S2 or M9 interface. Beautifully simple. Intuitive. Does not require trying to memorize the manual

, tossing the manual in frustration

, futzing around with camera functions, not getting it right, then going back to the manual you pretended to grasp

. 5D II's Customized settings on the upper left dial (the old film rewind location--if people here still remember those things!) are maybe a good compromise.
This body, of course, will never get made. It will be cheaper to make, but the market probably won't be there. But this is a wish list, and I can certainly wish for what amounts to a Canon 5D III Safari body.