When luffy told Zoro he will be pirate king, Zoro didnt realy have an answer at that time. He just wanted to be the World Strongest swordman.
Prior to Wano, Zoro never cared about being a king, just protecting his captain and help his nakama was his only worry. He never realy carred about himself beside his WSS dream. If anything his dream become second concern when he asked Mihawk to train him.
In his fight against King, Zoro realized more about himself this ambition of a king and because he doesnt want to challenge Luffy's leadership like Ussop, not that he cant he decided to be his shadow king, the co captain and right hand man that work alongside him.
Once his declaration to become the king of hell. Its his answer to luffy pirate king dream.
I will quote Zoro word for words.
Zoro having flashback: King of the pirates?
Zoro thinking for himself: Guess I might as well become the king of hell.
Prior to Wano, Zoro never cared about being a king, just protecting his captain and help his nakama was his only worry. He never realy carred about himself beside his WSS dream. If anything his dream become second concern when he asked Mihawk to train him.
In his fight against King, Zoro realized more about himself this ambition of a king and because he doesnt want to challenge Luffy's leadership like Ussop, not that he cant he decided to be his shadow king, the co captain and right hand man that work alongside him.
Once his declaration to become the king of hell. Its his answer to luffy pirate king dream.
I will quote Zoro word for words.
Zoro having flashback: King of the pirates?
Zoro thinking for himself: Guess I might as well become the king of hell.
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![](https://64.media.tumblr.com/bef58892bde425e1371f93c22e6bdb00/dc194235abe36efa-6a/s500x750/5c508300a304e7f0b6aea1581735cd838ec3e2cd.png)