I wonder what will draw Marco away from King to allow Zoro to fight him.
Marco's role is still unclear. He never aimed at defeating calamities.
> BM Stay out of this
> Whose side is he on ?
> Queen's you stay out of this
> You(SHs) are the muscles, need my help in anything ? I'll fly you(Zoro) to the roof if you want
> You(to King and Queen) are pitting yourselves against the new generation
> Not going after Kaido at this point
>
Holding off 2 guys(King and Queen) - the time Chopper creates the antidote
So far Oda only portrayed Marco as some kind of wildcard player helping the alliance without being personally involved. It's even unclear what his current role is after his objective of holding the calamities the time Chopper prepares the antidote ended
And since he heard that Luffy was defeated, and that he originally came to help in Kaido's defeat, it's not impossible that he might want to help Luffy like he did in MF to create a situation where Luffy could properly thank him like he wanted to do since mentioned in Zou
Which could potentially leave King open for Zoro(potentially after healing him)