We've been burned before about thinking that a Floyd Mayweather-Manny Pacquiao mega-bout is actually going to happen. The latest round of speculation and negotiation seems promising, but some fans might not believe it until the two boxers step into the ring together and start landing punches. The sense is that there is just too much money to be made for either party to balk at this point. Sports business expert Rick Horrow breaks it down:

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