[Fran~]

Originally Posted by milan kyuubi

Spoiler for manga:

No he separated ying and yang (good and evil) chakra of the kyuubi. Than he sealed the good chakra inside of Naruto. And took the evil chakra with him inside of the death god belly.
He could have taken the whole kyuubi with him, but he left the part of the beast to his son, so Naruto could fight Madara.

that's correct.


About Kushina, to me Kishi will keep that as an element for further development/plot. The same way he never told Jiraiya's training until he needed.

Land of Whirpool, Kushina's childhood and personality, all of that stuff are good material for Kishi to develop Naruto.