You know what they say about thinking about retirement. When you are thinking about retirement you already are. I wouldnt be surprised to see him slip. IMO he already has started to slip some. I dont think Pac will retire from boxing until its way too late. With his gambling problems and obvious leeches in his entourage along with his generosity he will be coming back to boxing for young guys to beat up. I have been saying it. He will be an opponent for Canelo in about 2-3 years. Basically come back for beatings to be able to feed his leeches and gambling habits.
One of those fights are going to be Julio Cesar Chavez Jr at 150 for the WBC middleweight (160) championship. None of them will be against Sergio Martinez of Floyd Mayweather as Pacquiao will refuse to face either of them.
It is an option, especially if cotto wins. Arum will offer cotto full redemption. I would like to see him end his career like this: marquez-mayweather-bradley-rios-canelo. I dont expect him to ever face martinez because of the size difference, and have not much interest for cotto 2 at the moment.
I favor Floyd in their matchup and build up to fights, but to be honest enjoy Pac's fights more. Love or hate either, when one of these guys go it's going to effect boxing dramatically for a couple years in a negative way. Any boxing fan wouldn't want either to retire, just fight better opposition.