We have the upper hand anyway, our foot is in the door with co-ownership. It's not as if Pescara are going to outbid us.
Co-ownerships work on the basis that a fee is agreed between two clubs, the player plays for one of the clubs (often the original club) for a period of 1-2 years. At the end of that the clubs negotiate the player. If they can't agree then it goes to blind auction.
I don't believe that Pescara can sell their 50% to another club without an agreement with Juventus, because it moves the goalposts of the co-ownership deal.