The Legend of Zelda: Skyward Sword's music hides a secret in plain sound

Here's something for all the Zelda continuity conspiracy theorists. FPAwesome was reversing the sound on YouTube videos one day, as we all do when bored, and discovered a big secret in The Legend of Zelda: Skyward Sword's GDC 2011 trailer. The background music, which sounds at first like a totally original composition, is actually "Zelda's Lullaby" in reverse! GoNintendo extracted just the audio, which you can hear after the break.

Is it a clue about the storyline of Skyward Sword, or is it the work of a playful composer? That's another one for the conspiracy theorists, as is the possibility that the back-masked music is a form of mind control.

[Thanks, Sean]