Kingdom Hearts 3: 10 Disney Worlds That Must Be Included
7. Wall-E
A space adventure hasn't been successfully done in Kingdom Hearts, and what better to go with than WALL-E.
Obviously one of the most interesting parts of WALL-E is the Axiom spacecraft. Although it's not massively vertical, if Square Enix could make it dense then it could still really work.
Sora could also use his Keyblade armour and glider in order to have some space combat, another element that hasn't really been seen in the series yet. A sequence where Sora tries to protect WALL-E and Eva as they dance around in space would be awesome.
The most crucial thing that Sora has to learn from the WALL-E world is that the power of hearts is so strong that it even works with robots like WALL-E and Eva. Even so, a world focusing on WALL-E should also put a lot of time into the humans.
WALL-E is one of the best Pixar films, and it really deserves to feature in Kingdom Hearts 3 in a big way. Just don't make it a transformation world.