I don't think he will fight Pacquiao or Canelo.
But there's not many out there for him to fight... I remember seeing in a video of Roy Jones Jr and Paulie saying that Amir Khan is probably the only one that can give him a run for his money, but I don't see Amir Khan fighting Mayweather anytime soon... maybe 2014? If he doesn't fight Canelo then I don't know who else he can fight
If i remember correctly, the Guerrero bout made Showtime lose money so I think they'll be banking on a superfight against Canelo (moreover on Mexican Independence Day) to cover back their deficits... which a Devon Alexander bout cannot do, for sure.