He apparently seriously considered moving to us before you got him. He just got too expensive. So he must have had some sort of interest in moving to us. I don't think Real or Barca would be interested, PSG seem to be a long shot, especially considering FFP and Neymar's position, so this would leave us with the English clubs you wouldn't want to sell to, Atletico, Juve and us. And quite frankly, I think becoming the successor to Ribery is far the most attractive option for him.
Obviously I'm just guessing. But I think it would be quite likely.