You know what.

I think Oda knows about the admiral vs Yonko debate.

Just like how he knows about the Zoro vs Sanji debate.

He’s gonna give Greenbull some stupidly impressive combat and/or AOE feat that throws fuel on the fire.
Like Oda probably gets a million Zoro vs Sanji and Admiral vs Yonko SBS questions that he chooses not to answer.

He’s definitely aware of any popular debates in the fandom.