First of all, "Sanctuary" was written first, and Utada stated that writing "Passion" was a bit difficult for her because that had to be released first.

Second of all, while I do agree that seeing High School Musical and/or Hannah Montana in KHIII would make absolutely no sense, perhaps Kim Possible and Jake Long: American Dragon would, and even though Hannah Montana won't be in the storyline of the game, perhaps Miley Cyrus and other Disney Channel singers can contribute music to the games. After all, we know that Jesse McCartney is also a singer, so perhaps maybe Roxas should sing in the next game. Furthermore, Disney movies are known for their musical sequences, so having the musical in Atlantica in KHII was a homage to that.

I think that SuperMillionaire wants to see a mainstream Western artist rather than an underground Western artist with popularity in Japan.
Yes, Roogle, you have that one right.

And I still don't get why Ariel wasn't a princess of heart in the KH series, despite her status as a Disney Princess in mainstream Disney media. Perhaps what they should have done is transform her into a human and THEN put her in that capsule.