Sorry if this has already been brought up, but I'm hoping that'll mean we get a Verum Rex game (maybe that's the IP for PS5 Square's been working on?) and that we will get other square property worlds.
If I had to make a list, I'd want to see a nice balance between the FF and Disney worlds, but if we got one big FF style world and could switch between characters to play with the others serving as party members that would work too. Maybe KH is trying to now branch away from Disney properties too? Imagine an all original world/worlds KH game. Other key characters and wielders as party members, other FF characters. Saga 1 was Disney, Saga 2 is Square, and Saga 3 is ALL KH BABY!
So, as above list: Dissidia world - too many plots to pick one FF game, so make it a compilation title. TWEWY world - conceptualized sequel to TWEWY and mayhaps a prequel to a TWEWY 2. Star Ocean - could bring gummi ships into play, considering how great and actual ship like the current gummi system is and meeting a group of SO characters.
If we can stick with Tri-Ace games, we can throw in Radiata Stories and Valkyrie profile as well. Then we can add in a slightly watered down Parasite Eve. Romancing Saga. So many potential Square worlds!! We could see a T rating as Sora gets older and if they do step away from Disney a bit. Sora could even say frick! To heck with this. Lol