Unless Pacquiao and his team decide against a 5th fight with Marquez, I see this fight happening, just because of the money JLM could make, I just don't see him walking away from a 10 million plus payday.
If it doesn't happen it will be because Manny doesn't want, that's my take.

BTW, i'd still love to see Rios vs. JMM.. it would be a great fight.