Shanks made a promise to Luffy that he'd return his hat back when he'll be a great pirate...
Also Luffy wants to show his crew and strength to Shanks to acknowledge him...
So ,Shanks dying?? Unlikely....
Rob Lucci said he'll beat Luffy at their final fight and kill the remaining SH's. Did that happen?
Ace said he'd make WB the King. Did that happen?
Zoro said he'll defeat Mihawk when he fought him at the Barratie. Did that happen?
And my favourite... Luffy made a promise which was
he'll escape MF alongside Ace. And let me ask you; "did that happen?"
---Bear in mind, all which I stated, correspond with
dreams &
goals. Just like your post does---
So your logic =
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yes there will still be yonko. think they will stop being pirates just because someone finds One Piece? Piracy
is the only thing they know, they will still want their territories and power.. why would this change?
The Emperor's exist because neither of them are better than the other and because they stalemate eachother in the quest for OP. So why would they still exist if someone has acquired their goal/dream and have exceeded them? And what does being an Emperor have to do with being a pirate aside from the fact that pirates are the Emperor's? Since there are a huge amount pirates who aren't Emperor's. And remember, people don't become pirates to become Emperor's, they do so to become the King of Pirates. So... the system of the Emperor's won't exist if there is a Pirate King.