I acknowledge the possibility that Kizaru may be a tough opponent but I can't see Kizaru truly being over Luffy
Like if he's still below the admirals then I have no idea what Oda has left in store
He can only make Luffy so much stronger than he is right now
Because its not about linear progression. Many of the top tiers left can fit into their own niches.
- Kizaru could finally force him to master FS in a way Kata/Kaido have not.
- Blackbeard may force Luffy to solely rely, in instances Haki only and without his devil fruit power, while BB has 2 to 3.
- Akainu, in theory, has the highest AP in the series solely because can melt you if you arent careful. This could be a pure brawl fight with Luffy trying to not get injured.
- Who knows what the fuck Im has if they are even a fighter, but ive always liked the idea of a water logia that can sap powers. Not dissimilar from BB, but the difference is youd become comletely helpless in the water as you would anywhere else.
- Shanks may have levels of conquerors that we just dont know yet. Basically a Roger protege. He also is a direct counter to FS and CoO, which would be interesting if Luffy fights him and cant predict his movements. It goes back to pre-TS struggles.