Wait, No-Ba-Di, Nomura also stated that he wants us to think of the scene as the future, which may hint to a scene similar to this one in which we have our heroes in the same roles (though not the same armor and whatnot).
I've got it.
The letter.
That oh-so-mysterious letter the Destiny Islands trio got from the king. Could it be about the keyblade war?
Edit: Aw dang, the future. Maybe the whole "History repeats itself" philosophy is coming around, and our three heroes will be placed in the same role, like Suhyessuh said.