With the announcement of the Floyd-Canelo fight and the suggestion that GGG might fight Froch do you think this is going to become more common in order to create bigger fights? IMHO this will become more popular due to the reluctance of a number of fighters within certain weight divisions ducking one another and the fans being denied the really big fights.
You haven't heard that Mayweather ruins opponents? Remember the likes of Oscar and Mosley had lost numerous times, when they were closer to their prime, but when Floyd fought them, they became his leftovers.