This is the first time we have had a manager who everyone is behind and really is "the boss". Pellegrini wasn't, and whilst Mancini tried to be, it didn't seem like he had entire support from the club. No one is bigger than pep in that dressing room.
It's a real shame if hart goes. He is city through and through, and hasn't been given a chance on the competitive stage, BUT if pep believes his time is up, then it is. Hate to use the example, but look at what Ferguson did - when he had to stamp his authority, he often did.