Wont we have to pay more money which would be determined by some council? Rooney buying out his contract is extremely unlikely at best ... As I said, has it even been attempted before on such a scale?
If there needed to be arbitration, but considering that United in your case would have told him he wasnt in their favour and wasnt getting a contract, he would win said case. It hasnt happened on this scale because no one would let it come to this. The closest you can get is Lewa and Dortmund. That worked out well...
It's certainly not extremely unlikely for him to buy his way out, not even close.