What is the likelihood that the Pacquiao vs. Mayweather fight will be bigger then these sporting events?

I don't know the exact #'s on how big these events are, but I can tell you that this fight will be the Superbowl of boxing if it happens. Not only is this an international sport, but people around the world are actually willing to pay $60 a pop to see these two guys square off. They are predicting 3M PPV buys worldwide which is unheard of. It would be hard to compare this event with sports that you can watch for free. If this were an internationally televised event, I can see this being bigger than the Superbowl and just as big as the FIFA World Cup.