Hey everyone including @WakelessDream long time no see with Kingdom Hearts IV being brought back to the spotlight I want to bring back the Kingdom Hearts IV world discussions where we can discuss on the likely worlds we might expect for the upcoming game.
There is debate regarding the main theme for KHIV with most say "Death" or "Contrast between people from different Positions", but I think Missing-Link and KH4 both share a theme - "bloodlines", I think Nomura would have looked at several Disney movies that have that theme. I know most people went down the line of thinking that the worlds in the game are purely going to be based on live action remakes, but I think the choices will be closer to more traditional selections from an environment and from an aesthetic and thematic standpoint for Sora's development.
Moana fits perfectly for theme is the daughter of the chief of the village and is trying to save her village and during the first film her Grandmother passes and becomes a guide for her, and she's the only child to the chief and his wife, so there's a bit of a family driving force going on there. Plus it's our Ocean Level
Coco is hands down going to be a world for KH4 no question as it correlates with death and remembrance with Sora trying to find a way back to his reality from Quadratum similar to Hector desperately trying to cross the bridge to see his daughter Coco.
Frozen II is about Elsa and Anna discovering how their parents met and their connection to the forest and the world, and their mother was the voice calling to Elsa.
Encanto also deals with bloodlines along with family and generational trauma which could provide major conflict in the world, plus the magic being in danger and extinguished by Abuela Alma's misguided thirst for the protection of the magic while creating and spreading stress, self-doubt and conformity throughout the Madrigal family is the perfect recipe that draws in either the Heartless, the Unversed, the Darknesses', and/or the villains such as Luxu and the Foretellers to this world. Not to mention, Sora being someone who isn't a Madrigal, and someone from another world who possesses a gift could also relate with Mirabel as she is a normal girl in a family of gifted people with no gift of her own and where she fits in, what her role is in the family, with their magic at risk, which is similar to Sora who also was passed over his chance to be a master due to something similarly out of his control, and knows what it's like to be passed over a chance to be seen as special and in the end was also key to his sides victory. Also Bruno could even be a possible character of interest for the Foretellers since Bruno can see visions of the Future just like the Book of Prophecies, plus the candle being the "heart" of Casita could also connect to the theme of anything (be it a human, creature, puppet, toy, robot, and object) can have a heart.
And of course there's Luke, Leia, and Vader at the heart of Star Wars Episode VI: Return of the Jedi.
Finally, Zootopia would be a fun world where it would fit somewhere in Unreality since it’s like the real world but just with anthropomorphic animals and be our animal transformation level. The trailer for the sequel drops tomorrow. If it is bound to be in KHIV, it’d be a good time to market it sometime this year.