Some people say that Mosley will not do good in this fight but don't believe everything you read out there. There was a reason Mosley did not perform well in the last two fights, Mayweather and Mora ran away from him that is why there wasn't too much action. Mosley is a slam bang fighter just like Cotto and Margarito so his fight with the Pacman will be fun to watch.
I believe Berto, Marquez and even Sergio Martinez will be future fights down the line it is not just happening now so people should not be upset. Hindi naman pwedeng labanan ni Pacman ng sabay sabay yan ;D. Mosley is the priority now because he is the bigger draw among them and they want to fight him (a boxing legend) before he retires.
This fight also gives a hint to Marquez and possibly Berto on how to get a fight with Pacquiao. Leave GBP just like what Mosley did by becoming a freelancer since Arum and the Pacman doesn't want to do business with Dela Hoya unless it is Mayweather.
As for Mayweather, we may never see this fight materialize.