Oda said in an interview that he had big plans for Kid
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The thing about Law and Caesar is that it makes no sense. Caesar has literally zero moral code. But for Kid, he's been portrayed as a rival of Luffy's throughout this arc. It honestly makes no sense for his crew not to get a big boost as post-wano, Kid will easily be one of the strongest pirate captains on the sea. With his personality and drive to become pirate king, he should get a powerful crew.