He has said many times prior that he don't want to face GGG for a trilogy. It was Oscar who are pushing for it (obviously for money.)
After the fight with Kovalev Canelo was asked about his third fight with GGG. He told that he has beating GGG for already 24 rounds and not interested in boxing another round with him
C'mon we already know that the first fight was GGG.
@bisdak40 - he can stay in LHW because that is one of the weakest division.
@Kasabus - I doubt that Mayweather vs Canelo will happen, I mean Canelo can't even squeeze his body to 154 lbs and Floyd's best weight is 147 lbs.