Minor spoiler for 1165
In 1165 we meet the guy who looked like Marco and kicked Silver axe.
Now there are people who think this guy is a reincarnated Marco,I dont think this is it because of his name. His name sounds like a play on Marco Polo. Making Marco's name Marco Polo .Maybe its already been confirmed but I think this guy is Marco dad
Whitebeard doesnt know who this guy is,so its likely he wasnt famous or he wasnt powerful. This was a set up to the formation of whitebeards crew,but why now. The whitebeard pirates are irrelevant and dead unfortunately So I dont see a backstory
My theory is that he stole Marcos pheonix fruit from godvalley,teamed up with Whitebeard and died a while later. The crew is called whitebeard pirates though,not Polo pirates so I wonder how that was decided.
What if Witebeard was the one who killed Polo and took in Marco to raise him?
Power wise I dont know how strong this guy was at all,all we see is him fight Kyo who is also unscaleable. All we know about him is he was a rival to Shiki. He was probably at the level of a yonko commander