I think he could only die if the war between the heartless and him got to be sooooo long and strendious dying would be a big relif (only after he defeated them all) the i guess it would be ok. Even more so if his only choice was to sacrifice his soul and heart to end the heartless attack once and for all. But it would be cuter if he lived, and lived with kairi happily ever after, and had a son, who then could be the next keyblade master. or some happily ever after thing like that. oooo what if he became the successor after mickey? thatd be interesting! But im taking this topic off subject.