Bradley vs Marryweather...winner gets Pacquiao that's where the money is for the Promoters.
If Mayweather fights and beats Bradley, there won't be a Mayweather-Pacquiao fight. Mayweather already wants 60% of the purse and all the PPV...that is what he demanded to fight Pacquiao in June. If he beats Bradley, he'll say Pacquiao isn't good enough since Bradley beat him and want 75% and all the PPV. Pacquiao ain't gonna fight for that.
He might for pride.
Pacquiao turned down the 40% and no PPV money. I doubt pride will change his mind for less knowing the boxing public wants this and it is worth over 100 mil to him.