Rewatching ATLA and some of its badass and amazing female characters such as Katara, Azula or Toph make me really miss the lack of real strong and interesting female characters both in abilities and personnalities in One Piece.
With this chapter I would be even more interested into seeing Kaido meeting and possibly fighting Blackbeard, though it's very possible that it may never happen in the manga. I would love to see Kaido's reaction to Blackbeard's two df in battle and to his idolization and possible connection to Xebec.
Nox is really an awesome antagonist : not only he was so badass with his time powers, his sword and his inventions but he also had a cool and complex personnality, a very tragic backstory and unlike most antagonists he really had regrets for his actions. Those who haven't seen Wakfu should give it a try.
The Heart Pirates are really mistreated by the story too, they have minimal revelance, outsider of Bepo and Jean Bart they have no real fighting skills or identity, they didn't even help their captain during Punk Hazard and Dressrosa arc, their presence did nothing to change the balance of the battle at Zou, they got themselves captured in Wano and are the only members of the Alliance to miss the action at Onigashima