The biggest obstacle will be money. He's going to have to pick someone that will sell. He has to get HBO to help pay for it. HBO also has the Pac problem, they could support him instead. If HBO won't help then he needs an opponent that can sell seat and or PPV. Either scenario for PBF leaves him with very few opponent. Whoever he fight will demand 7 figures payday.
Theirs rumors going on on other sites that HBO PPV is going to show the Pac fight and it will be titled The Event, and that Mayweather will be fighting in April now.