He wont go to TNA if his contract ends with WWE. I think his loyalty lies with WWE he will go and do what ever he does when he isn't doing things for the E. Then sometime time down the line he will be back doing a promo for a book or some kind of appearance, Special guest ref or what ever. As for wrestling again i don't think that will happen either his time for taking sick bumps week in week out are over. Maybe a 1 off match on smackdown this week to avenge what Edge did to him the week before last but even then that probs wont happen maybe a run in to attack Edge but not a full match Mick's time in the ring is over. But it don't mean he will run over to TNA either.