Canelo Alvarez says he's dead serious about setting up a rematch with Floyd Mayweather -- and his promoter, Oscar De La Hoya, says Floyd has more than a BILLION reasons to make it happen.
"If Floyd Mayweather decides to come back, a fight with him and Canelo could be a $1.5 billion fight," Oscar tells TMZ Sports.
Of course, Canelo and Floyd initially fought in 2013 -- with Floyd dominating the then-23-year-old rising star. Floyd got a $41 million guarantee for that fight, which was a record payday at the time.