Yea I doubt that. If a 37 year old Mosley spanked him with loaded gloves... the next "great welterweight" would beat him to.
the drama that ensued in the locker rooms with nazeem richardson going hysterical on Capetillo could have have had an effect on margerito frame of mind before the fight.
I think it may be a bit too presumptious to say "NO WAY JOSE!" off the bat. Remember this IS boxing and reclamation projects are all the rage in boxing. Wouldn't surprise me if there WAS some guy (Arum) who tried to rebuild Margarito as a victim of circumstance.