So more I see of the Flyers, so more I see feats of them, so more I believe that the battles against the Calamities going be to insane battle who gonna shake the whole area, this going for sure for anybody a hard test. At this rate I don´t really thing that they get defeated in 1vs1 battle, Oda hold them off alongside with Kaido for the end of the arc as major problems, he spend Jack his own arc, Queen his own mini arc(even right now he get many screentime) and over the top King will get his insane hype. These guys aren´t jokes and as one of fewer user I still think even Luffy would have hard time to take them down(at least without any new powerup ala G5)...
The war will answer us a lot of question and give us more powerlvl thread material as
@Admiral Lee Hung already state for Yamato.