I know it's Real Madrid but I don't get why Ancelloti would go back. Their squad is Serie A retirement home age it needs an entire overhaul and they've got no money to do it yet will expect not just to compete at the top but win. I don't see how any manager could be successful there in the next few years.
As for Everton. They should go after Potter, back him with some money as they've done with their last few managers and give him some time and he will have them challenging. He's a great manager.