When this game came out, the official Disney Princess lineup already existed, so why did Kingdom Hearts not roll with the lineup when choosing the Seven Princesses of Heart?

At the beginning, the 9 princesses were Snow White, Cinderella, Aurora, Ariel, Belle, Jasmine, Pocahontas, Mulan and Tinker Bell.

The 5 they chose from the lineup are Snow White, Cinderella, Aurora, Belle and Jasmine. Kairi was obviously one, so they have one position left to fill. Not using Ariel and Tinker Bell makes sense from a practical point of view due to living underwater and being tiny respectively.

So why weren't either Mulan or Pocahontas chosen? Pocahontas has never even featured in a Kingdom Hearts game! It seems odd to instead choose Alice, from a film which has largely been forgotten (relative to other films used) over Mulan and Pocahontas which were fairly recent at the time of the game release.

Has this ever been asked before? Was there ever an answer?