Rooney asked for a transfer because he has become tired of working under Ferguson, it's unlikely he's disillusioned with general life at the club (contract, trophies, players.) That doesn't make him a cnut, not everybody has to think Ferguson is a God. He may not want to sign another contract and have to work with him every day for another 5 years.
Ferguson was weighing up his options anyway and decided he couldn't be bothered anymore. No better time to bow out than now. He retires.
Moyes becomes the standout candidate and rumours circulate he will take over in the summer, possibly bringing Rooney's pal Phil Neville along with him. This intrigues our shit haired striker.
Moyes is appointed, but Ferguson will remain for the final 2 games, which will be uncomfortable for Rooney but he can probably live with it before making a decision in the summer.
Moyes will surely try to convince Rooney to stay because he's such a quality player. Rooney stays and scores 23 league goals next year.
I have a source.