Sooner or later the NBA commissioner will have to do something about it. He said publicly that he doesn't want how Durant demanding a trade after signing a huge contract. Sooner or later we will see some rule change, at least to have team owners get a better deal when they sign this kind of players.
And since they can't be simply be traded right away because the Nets wants more, and you can't blame them. Again, it boils down on the money they put in the line and they want something in return, like future draft picks, because that's what the lost as well when they sign the 2.
They must take the necessary action, it's not normal that players are acting like a boss, yes, Durant has some talent but without a team that will sign him and pay a huge contract, he will surely not gonna feel like a superstar, he has to be committed to the Nets as they trusted him, not the other way around.