You can call him as you want - Bumlovkin, hypejob, etc, but it doesn't change the fact that GGG will destroy Canelo. Which round?
I think Canelo will be competitive for a while. He's got the faster hands, good defence and is a good counter puncher, he will test Golovkin's chin. But I can't see him beating Golovkin. He doesn't have the movement to keep him off and I don't think he has the power at middleweight to really hurt Golovkin. He'll have some moments early on but eventually Golovkin will grind him down and the pressure will be too much and stops him in the 2nd half of the fight.
Canelo will hide behind the 155-pound line despite being the middleweight champion. If they fought, GGG take him out in rounds 7-9, I think.