So lets asume Bravo comes in (seems like a serious enough rumor), and let's asume Bravo is brought in to be number one, who do we wanna sell: Hart or Caballero?
You can look at this transfer in two ways. Hart needs more time to get to grips with what Pep wants from his goallie and Hart is given time due to his status within the club. Caballero is nearing an age you want him to go and play regular and he is probably easier to move on. I might even go as far as swap Bravo for Caballero to solve Barca's problem for looking at a new number two.
Or ... Pep simply doesn't rate Hart, never has done so, and will move him on because he figures keeping Hart in a number two role eventually brings trouble in the squad due to the players' influence.
Imo as it is now, Bravo comes in, fights it out with Caballero and Hart is on his way. And to be honest, that was probably the last thing I would say about any changes I expected 3 months ago.