Somebody's 1 has to go, how big is GGG vs Canelo if GGG takes a loss?

Depends on how he loses

 

It obviously comes down to how that -1 on GGG record is. Was it a decision? Was it a close decision? Did he lose by KO? Was it a robbery? Did he lose but manage to KD the opponent? Did he get KD himself? Was it against a quality opponent?

Just so many variables. But yes it would definitely make the Canelo vs GGG less valuable regardless of the reasons. How much less? Depends on the things I listed

 

I became even more of a fan of Roy Jones and Chris Eubank AFTER they lost their first matches, so I'm sure I'd still enjoy watching GGG go to work on folks if he takes a loss.

 

Mayweather @160 gets sent to the infirmary. He'd have to drain the life out of GGG to beat him. Frankly PBF vs GGG would never get made fairly, their weights are too far apart.