Oda likes to parallel pre TS a lot but with slight variation.

Ex: Dressrosa is Alabasta but if Crocodile had succeeded in taking over the kingdom.

Luff will punch Saturn like Charlos, but unlike Charlos, Saturn will then proceed to beat Luffy’s ass.
Could see Oda do a reverse of that scene. Saturn gets punched but unlike trash charlos he shows he can actually take a punch and proceeds to reveal his possible power whether through Imu or whatever.

Would be kinda neat if that weapon Imu has empowers the Gorosei, so that way it explains how they would be able to fight an Awakened Luffy despite their age, and at the same time we get a peak of what that thing is.
 
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