Personally I'd agree to all but Halloween Town and Kingdom of Corona as returning worlds for
Kingdom Hearts IV.
For Halloween Town, although I'm not opposed for an original story and experienced an accurate representation of Halloween Town much like they did it with the returning worlds of Olympus and The Caribbean for KH3, what else can we do here Halloween Town? I'm pretty satisfied with the way they ended the world off in
Kingdom Hearts II, not to mention that other than Christmas Town we don't know what the Holiday doors look like cause we NEVER had visited them nor were they shown in Oogie's Revenge.
Besides, having Oogie Boogie being brought back to life again would feel pretty repetitive and linear at this point. Even the same can be said for Olympus (Hercules') cause after the destruction of the Titans in KH3 I just feel it would be redundant having Hades coming up with a new plan to destroy Hercules or takeover Olympus after he keeps foiled again and again, so I doubt Olympus is coming back for the next KH games as is Halloween Town.
As for Kingdom of Corona, I find the world to be more disappointing than Arendelle in my unpopular opinion mostly during the world's 2nd 3rd act due to how Sora, Donald and Goofy stood out like a "sore thumb", removing mentioning of the golden flower, Sora and the gang never questioning Rapunzel's long hair along with witnessing Rapunzel’s magic powers through her hair, changing Flynn/Eugene's character, and having Sora and the gang be clueless of Mother Gothel's true colors while remained blissfully unaware about her after their first and ONLY time encountering her, before Marluxia tolds them through context. Even the world itself raised more questions than answers when compared to The Caribbean and Arendelle, cause it sure doesn't look like Rapunzel's journey from the tower to the Kingdom was two days like in the film, nor do I think that Rapunzel and Flynn EVER went to the Snuggly Duckling with the Pub Thugs and the Dam like in the movie when they separated from SDG from the Reaper nobodies, and I don't think that the Guards were also after Flynn as it was only Maximus that chased him which would explain his dialogue:
Even the scene with Sora, Donald, Goofy and their first and ONLY interaction with Mother Gothel still raised Red Flags, to be frank and If I were in their shoes or be right beside them and if Gothel gave me the cold shoulder calling me "useless of no help" I too would raise an eyebrow and think to myself you know something feels of with this woman.
Lastly regardless if the world brought up the "New Seven Hearts" (as Rapunzel is one of them) and Marluxia thematically fit the world, neither Rapunzel nor Mother Gothel respectively never brought up his name again for the remainder after their first encounter of him, which made his appearance and role in the world very pointless. At least with Monstropolis, Toy Box and San Fransokyo, the inhabitants do acknowledged the Organization XIII member (Young Xehanort, Vanitas, and Dark Riku) and not brush them off like it never happened, particularly the former world when Randall had a "teamup" with Vanitas.
At least Xaldin was handled much better in Beast's Castle than Marluxia. lol
I made a lot of complaints on Kingdom of Corona, before which you can view
here,
here,
here, and
here. While I'm not saying Arendelle is above Corona, that's not the point, but when compared to the other KH3 Disney worlds stories I'd put Corona below The Caribbean, San Fransokyo, Olympus, Monstropolis, and Toy Box.
I just don't want for future Disney animated films that become worlds like
Wreck-It Ralph, Moana,
Zootopia and Raya and the Last Dragon to endure what Arendelle and especially Kingdom of Corona endured in KH3 where they become to forced and linear like what happened to those two worlds in KH3 which causes SDG to either interact with the cast but don't play much of an impact in the world (in Arendelle's case) or have them stick out like a "sore thumb" in certain instances of the world and not knowing what the heck is going on, ), while the movies characters just primarily play out like in the movie but not acknowledged SDG until after the conflict is solved (in Kingdom of Corona's case). I'd rather have the future Disney worlds to be like the retellings of the film from KH1 and KH2 (mainly on Space Paranoids, Beast's Castle).
Finally it will come down to whether or not Nomura and his team are that interested in having Halloween Town and especially Kingdom of Corona return for future games cause it all comes down to:
- Which Disney or Pixar films do Nomura and the development team want as worlds in the game
- Which specific Disney worlds they want to reuse again for that specific KH game.
- The themes that the specific Disney or Pixar film have in common to the theme of the specific KH game (e.g. Friendship, Trust, Connections, Promises, etc.)
- The Story the world can offer and for Sora's growth/character development
- The gameplay value and environment that the world can offer.
- Variety
Not to mention I haven't seen Halloween Town be used in any other KH games since KH2 and 358/2 Days respectively.
I'd say from the worlds that are likely to return to KHIV they are:
- Agrabah
- 100 Acre Wood
- Toy Box
- Arendelle