Of course that stopping a fighter like GGG it would look good on paper but we know that G is an old fighter and you can't beat Father Time.
As a fight imo this is a poor matching, a cash out for G, a huge money grab for both sides, milking the game big time and I'd have liked to see Canelo fighting a younger guy like Benavidez or rematch Bivol.
Probably at this point old GGG would get stopped or beat up badly by Canelo. But who knows, maybe G still has enough gas in his tank to make the fight competitive for 12 rounds.