just my two cents, Canon is falling behind the tracks here, sales dropping like potatoes, the 5dmkii was the first full frame affordable camera, sold like the gold rush but these last 6 months alone we can all agree that its already a out dated by cameras with wifi allowing ipad iphone androids to control them, eliminating remotes, programing nightmares over with when it comes to time-lapse, motion detection you name it, unfortunately our 5dmkiiis are already not up to par with 2013.
I say the best camera to date by canon this year will be the 7dmk2, full frame, faster then the 5dmk3, unlimited video recording, HD (no need to go out), this means you can record at least 1hr plus on a 32GB CF card at ALL-i 4:2:2, hopefully that is what this new breed will introduce, plus a IOS android app to comunicate with your camera any where in the world with its own unique IP.
I imagine the 5dmk4 will have the same but 4:4:4, the C300 will become full frame and the C500 will have even higher standards., something we will hear about by the end of 2013 (does not mean it will be here but until 2014) if you want to talk about rumors canons next surprise is a IOS app that does more with their products then the cameras own system.