History HilariousInHindsight / OnePiece

* The 4Kids dub was already a joke for, among other things, cutting out a story arc involving a whale named Laboon, and another involving giants. Two later arcs that came up about 200 to 300 episodes later involved plot points based on those stories. The first one involved a character being friends with the two giants from the missing arc, and the existence of the giants allowed another couple of giants to [[HeelFaceTurn switch sides in a very important arc]] and, in the second, the author introduced [[spoiler:a new crewmate, Brook, whose entire character motivation revolves around getting back and seeing Laboon]].
* There's also [[http://www.mangaeden.com/En/One%3D_%3DPiece/14/ the cover of Chapter 14]], which shows Luffy as Literature/{{Dracula}}. Much later, this becomes an inadvertent StealthPun when you consider that [[spoiler:"dracula" means 'son of the dragon']], at least in older Romanian, which is quite accurate as Luffy is indeed [[spoiler:''[[LukeIAmYourFather Dragon's son]]'']].

** In the upcoming Netflix adaptation, Sanji will be played by Taz Skylar, who many have noted bears a striking resemblance to Slim Shady himself.

* One early post-TimeSkip SBS was a reader jokingly asking if Sanji's new character design, which puts his bangs on the other side of his face, is actually "[[spoiler:Sanji's [[LongLostSibling long-lost brother]] [[PunnyName Yonji]]]]". Come the Germa 66 Arc, and turns out, [[spoiler:Sanji does have a brother named Yonji]]! Furthermore, it's revealed on the cover of Volume 84 that Yonji has ''green hair'', and considering how much Sanji hates him, it suddenly makes a lot sense why he constantly mocks Zoro for his green hair. And it is hilarious.

* In the second version of ''Romance Dawn'', Luffy's grandfather (who would become Garp in the main series) is a pirate and actively encourages Luffy to be one. This is in heavy contrast to the famous marine he is actual manga.

* The Whole Cake Island Arc: [[spoiler: After gaining notoriety, one of the heroes (Sanji) is hunted down by his [[AbusiveParents abusive, egotistical father]] who takes him as a prisoner against his will to gain power for himself, only cares about his offspring if they carry the genetic superpowers he wants, and is responsible for putting his son's mother on her deathbed. Also, said hero's [[ParentalSubstitute foster father]], while [[ToughLove still rather rough around the edges]], treated him better than his biological one ''ever'' did.]] All in all, it sounds frighteningly similar to [[Film/GuardiansOfTheGalaxyVol2 Peter Quill's predicament.]]

* One early post-TimeSkip SBS was a reader jokingly asking if Sanji's new character design, which puts his PeekABangs on the other side of his face, is actually "[[spoiler:Sanji's [[LongLostSibling long-lost brother]] [[PunnyName Yonji]]]]". Come the Germa 66 Arc, and turns out, [[spoiler:Sanji does have a brother named Yonji]]! Furthermore, it's revealed on the cover of Volume 84 that Yonji has ''green hair'', and considering how much Sanji hates him, it suddenly makes a lot sense why he constantly mocks Zoro for his green hair. And it is hilarious.

* Minor early example: when Nami first met Luffy, she called him "Boss" as a way of getting Buggy's goons who were chasing her to go pick on Luffy instead. [[AsYouKnow Three arcs later, she wound up officially joining the Straw Hats as Luffy's navigator]].