Board Thread:Boruto: Naruto the Movie/@comment-1693281-20160126142458/@comment-25093611-20160201201630

^because it makes no sense? if unfinished business was allowing shinobi to be reincarnated than there should have been at least a few who came back :I

obviously it must be something more unique, they are the sages sons and have each 50% of his power integrated in their bodys since birth, this sounds more like a reason exspecially since both, so6p and his brother, showed that they can do something ghost-like too :)