Zoro will show everyone who he truly is this arc.
Just like how he did at the very start of the story and now at the beginning of the Final Saga.
Oda has very interesting timing with how he aligned the live action and Egghead's climax.
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The truth is Kizaru, Lucci and Saturn have all underestimated Zoro.
Even at the very beginning of the Final Saga and Egghead the crew jokingly called Zoro an Ogre from Onigashima, Green Mom, Green Kaidou and Crappy Moss-Head.
These names are very obviously alluding to Zoro being Yonkou level!
I don't know what exactly an Ogre from Onigashima means, but I think the meaning behind Sanji calling Zoro Moss-Head all this time was actually Sanji calling Zoro "Green Rocks", this name especially makes sense since Zoro has multiple heads in Asura form.
This is a reach, but I think Green Ogre from Onigashima is Luffy calling Zoro a Green Ancient Oni.
Just like how there's Ancient Giants, there were Ancient Oni.
Apparently Onigashima was also at the summit of Mt. Fuji, so Zoro ancestors could very well be from there.
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I've been drawing parallels between Punk Hazard and Egghead.
Lucci is Monet this arc with the way he's been handling the Seraphim kids.
Saturn is Vergo who was staying in the dark and how they both were under Imu and Doffy.
Kizaru would have to be Caesar with how Kizaru's light field is surrounding the island like the gas.
Just like how Monet and Vergo died, I think two of Kizaru, Lucci and Saturn will shockingly die by the end of this arc.
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Zoro's fight with Lucci will symbolise him overthrowing Lucci as the leader of the Seraphim.
Zoro's path to becoming the King of Hell starts with S-Snake, S-Hawk, S-Bear and S-Shark voluntarily following Zoro their King.