Does seem that he was convinced he was leaving, this could all be some kind of gentleman's agreement so that he can leave in the summer to a club of Man Utd's choice at a figure closer to his value. Can't see him having a future at the club, you can't burn your bridges this spectacularly and basically tell all your colleagues that they aren't good enough for you, then waltz in a week later with an enormous pay check, then expect them to get on with you.