Hey Scott,
What would actually happen if on Wednesday night if one of WWE's contracted talent who's fed up with their current work situation just showed up on AEW. Would it just be a heavy fine or would it be more serious penalty?
They would be in breach of contract and I believe would immediately be liable for all the money that WWE had paid them previously. More seriously, AEW would be guilty of contract tampering and WWE would sue them into the Stone Age for millions of dollars. It is not worth it for either the talent or AEW to allow that to happen.