Mine is King vs. Katakuri. I know Oda portrayed Big Mom and Kaidou as relative equals but it also feels like it applies to their respective #1's. I doubt he did this directly on purpose but in a protracted fight, I honestly feel like King and Katakuri would stalemate the exact same way their captains did.
Katakuri has a huge haki advantage, but! He'd likely have to learn CoC infusion on the fly the same way Zoro did (which I'm 100% sure Katakuri could do, but I'm not sure if he has the same ridiculous stamina Zoro has), and we saw that sheer speed is a weakness of futuresight (although it might have been moreso the unpredictability of Python's wacky angles disrupting Kata's futuresight).
Likewise King has a huge biological advantage with lunarian physiology just being like the New World equivalent of upping the stakes as fishmen were described in East Blue. Much like the CoC infusion thing it'd be a learning curve for Katakuri to figure out the lunarian gimmick but I'm pretty sure he'd figure it out a *lot* faster than most Dumb Dork upper-tiers like Zoro.
Katakuri has a huge haki advantage, but! He'd likely have to learn CoC infusion on the fly the same way Zoro did (which I'm 100% sure Katakuri could do, but I'm not sure if he has the same ridiculous stamina Zoro has), and we saw that sheer speed is a weakness of futuresight (although it might have been moreso the unpredictability of Python's wacky angles disrupting Kata's futuresight).
Likewise King has a huge biological advantage with lunarian physiology just being like the New World equivalent of upping the stakes as fishmen were described in East Blue. Much like the CoC infusion thing it'd be a learning curve for Katakuri to figure out the lunarian gimmick but I'm pretty sure he'd figure it out a *lot* faster than most Dumb Dork upper-tiers like Zoro.