Is it possible by defeating Ventus's heartless (Vanitas) in Birth by Sleep that it now developed it own being and is no longer part of Ventus, kinda of how like Ansem and Xemnas are no longer part of Xehanort. Anways my theory is that if they revive Ventus's nobody (aka Roxas) then Vanitas can take it over and become the thirteenth vessell.
Is it possible by defeating Ventus's heartless (Vanitas) in Birth by Sleep that it now developed it own being and is no longer part of Ventus, kinda of how like Ansem and Xemnas are no longer part of Xehanort. Anways my theory is that if they revive Ventus's nobody (aka Roxas) then Vanitas can take it over and become the thirteenth vessell.