- Destiny Islands (Possibly, could be during the ending or Sora goes there one last time just before the battle, just in case he dies). I know Sora wont die.
- Radiant Garden- High chance this world is returning. possibly Kairi and Lea's training location. Also a headquarters for the heroes.
- Keyblade Graveyard - The Final Battle location and to save Terra
- Castle Oblivion/Land Of Departure - To wake Ventus.
- Twilight Town - Already confirmed.
- The Realm Of Darkness - To save Aqua
- Daybreak Town or Cable Town- Possibly
- Radiant Garden- High chance this world is returning. possibly Kairi and Lea's training location. Also a headquarters for the heroes.
- Keyblade Graveyard - The Final Battle location and to save Terra
- Castle Oblivion/Land Of Departure - To wake Ventus.
- Twilight Town - Already confirmed.
- The Realm Of Darkness - To save Aqua
- Daybreak Town or Cable Town- Possibly