Well, I have yet another theory for you to contemplate (and this was in the "Yes, another theory" thread).
So when the Keyblade destroys Heartless the hearts are freed and they form Kingdom Hearts. What happens when the Keyblade destroys Nobodies? Do the Souls/bodies go off somewhere too? Maybe they make their own place, or reform with the hearts to make a new creature. Please, don't rant or say that my theory is lame, just add on and make sense of it.
So when the Keyblade destroys Heartless the hearts are freed and they form Kingdom Hearts. What happens when the Keyblade destroys Nobodies? Do the Souls/bodies go off somewhere too? Maybe they make their own place, or reform with the hearts to make a new creature. Please, don't rant or say that my theory is lame, just add on and make sense of it.