Powers & Abilities If King does not have coc then Katakuri will have greater role in the story.

However if king does not have coc then katakuri is special & will assist luffy in final war.
The real question is why? Even if we say BM dies, why would he risk Tottoland. Or risk his siblings from a war knowing he is a loving brother to some. And why would he assist Luffy? Doesn't make sense storywise.l
& people are giving arguments like katakuri was luffy's main fight.

Cracker was also luffy's fight.
Kata was the main fight because he had more dedicated chapters than Cracker and Kata is stronger than Cracker.
 
99% sure King will have in the end, overall, a greater lore. He was the main villain of WCU, he estavlished a relationship with Luffy, Oda could even make him reappear like Croco or Lucci while King on thevother hand is just at best the 3rd villain of this arc and will just be the rival of Zoro in Wano, maybe even not the main rival since Zoro fought Kaido and BM. So overall their powerlevel should be very close but Kata's role in the end makes him more important for the story. At least if Oda doesn't build some super duper important stuff beeded to find the OP upon his race or something like that (but we know it will not happen).
 
I don't see Queen unlocking CoC haki, CoC haki is related to lineage factor and if Oda covets to stick to consistency he needs to limit the amount of users. On top of it, it doesn't strike to me like Queen really features the characteristics to possess it.
 
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