I have actually considered this matchup myself I envision a similar tear up to Pac/Marquez ,and yes it would be a tear up i can actually see Triple G the victor , purely on conviction and accuracy of punch .
We've not seen GGG at 154. If he handles the cut well, he splatters that hideous pumpkin head into a million pieces
We have no idea what Golovkin looks like at 154. I doubt he can make the weight. A weight-drained Golovkin obviously loses to any top LMW.
GGG got ring generalship and good movement but Manny teeing off at those angles will either get him the KO or get him KO''d ! And I'd say former. Not the latter....
Nowhere as near as accurate as JMM which is where the punch effectiveness comes from. JMM's power is commiserate with his awesome elite boxing technique and would give GGG lots of problems...
At this point Manny is too old but it would be competitive. Golovkin would beat him, his style and size would be too much.
It depends on whether or not Pacquaio can get GGG's respect. And even then, Pac would have to fight a very cautious, near perfect fight. The one thing that will give Pacquaio a chance is his power. If you don't have power, you can't keep a guy like GGG off of you, especially if you're undersized. But is it enough? And even then, GGG hits so hard, that Manny would have to fight very cautiously.
so basically the consensus is GGG kills pac but if pac wins its because ggg is weight-drained even though no one has any premonition of how ggg would look at 154?