Nets' ownership and Jay Z both got a lot from their association. The Nets got a successful rebranding as they took root in Brooklyn, and Jay Z got a lot of cachet in the sports world. As an icon both in hip hop and as a minority businessman, he's going to at least get his foot in the foot with a ton of prospects in different sports.
I see him building a huge sports and entertainment agency. Smart move. Maybe in a half decade, he'll sell the agency and buy his own NBA franchise.