Pacquiao knocking out Hatton does not mean Pacquiao would be able to "destroy" Mayweather. Mayweather will win this fight, possibly stopping Pacquiao.
And that's what's gonna happen, Dude...you watch. That and a purse dispute is gonna prevent this fight from happening. Floyd knows that he can weigh in on fight day well in advanted over Manny. This says alot as to why he chose JMM when you think about it.