I think with the decision recently being handed down on the IRS case, the Estate can finally exit probate. It's my understanding that the Executors will become Trustees and will remain in an advisory capacity, to assist the heirs to manage the Trust. Bringing Prince on board is definitely the first step to an eventual transition of power. Prince should make sure that he learns as much as he can from John Branca, who has a wealth of skill and experience.
I wonder if Prince has seen the images of those written notes MJ had that were discovered after he died that say "dont trust John Branca"