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Quadratum backstory,more of Scala Ad Caelum and the dandelions, Yozora backstory and more of his companions. Disney new worlds like Moana. Pixar new worlds like Turning Red and Inside Out 2.New summons like Sisu(from Raya). New party members like Judy Hoops and Nick Wilde

For the story itself I Think we see Kairi's Gameplay,more of Aqua,more of Roxas. Riku will be surprised with Yozora resembling his face features.Probably Toy Story 5 will be featured here to show the clash between real,virtual and the harmony between. Wish,despite being a mid movie,could be a great world for KHIV,but I want an original plot for the game. Frozen II will be great too.More of Luxord,Marluxia,Larxene e Demyx's backstory.

I hope it has a good story hopefully there will be something in each disney world that is connected to the main story! Oh and Pixar and original worlds too! I’m also hoping to see both new and returning worlds from past kingdom hearts games!

In addition to stuff I have shared in other posts on here, I would LOVE to see Sora find a way to reunite Strelitzia with Lauriam, alongside Sora, Donald, and Goofy locating the means to save everybody in Quadratum who is hurting (after what we have seen thus far in this series, it only makes sense that more people need rescuing in the second saga).

My prediction is that Quadratum will act as the tutorial world whilst also starting to show us how Yozora, the characters from Union Cross, Dark Road and maybe even Missing Link, as well as old faces like Luxord, fit into this new saga. The tutorial section will end (hopefully) with Riku finding Sora. Together they then attempt to return home but find themselves travelling to all sorts of other worlds along the way, possibly due to interference from the Master of Masters and Luxu. I'm also hoping that Strelitzia will go with them, driven by a desire to reunite with her brother. She could then be the main magic user of the party in place of Donald (in Union Cross Lauriam says that her magic is stronger than his) whilst Riku takes Goofy's place as the defender. The game will possibly end with them finally getting home and being reunited with everyone (and Sora might finally kiss Kairi). Of course this would break the tradition of numbered KH games featuring Sora, Donald and Goofy as the main party so maybe they return home early in the game or Donald and Goofy travel to them but Nomura did say he was doing something different with this game. I also think the Princesses of Heart will still play a role in the story as KH3 started introducing the "new seven hearts" but only confirmed 4 of them, so KH4 might confirm the last 3 with Sora visiting those princesses' home worlds. Lastly I'd love to see Ven fully remember his lost past and reunite with Lauriam, then properly meet Strelitzia for the first time and gain her forgiveness. Maybe Elrena will even show up and reveal her sweet side? And then there's Demyx's true identity. So much to include!!