It will be a revolution - the 7D will get the guilotine
I don't want to start another one of those threads.
What ever the next high end (pro, semi pro) aps-c camera (7DII) the trend is to up the price.
To justify this, improvements will have to be made.
My guess is that refinements to the sensor and autofocus (also AI Servo) will be made along with dual digic 5+ chips, refinements to weather sealing, and metering (AWB)
When the the 7D came out it was a big deal, a pro body with an APS-C sensor.
Unless there is a breakthough in sensor design my gut says the next "7D" will move forward at about the same rate as the 5DIII did vs 5DII