No, it doesn’t exist yet. But when you muck around in a lab a lot kicking the tires and trying to break stuff just to see how it reacts, doing unsupported stuff you can get a “flash forward” sometimes.
Look at the picture above, this is what a rolling upgrade from Windows Server 2012 RTM to Windows Server 2012 SP1 might very well look like as this message is the one we all know from the previous versions . Alright, that’s enough time travelling for today. Back to work.