Originally Posted by
Ryoga-san
It could be used as a plot twist if Madara was the one who killed Kushina by extracting the Kyûbi from her. Yondaime might have felt responsibility for not having protected her and decided to sacrifice himself to make Naruto the new Jinchûriki. This knowledge could lead Naruto more towards defeating Madara and not just focusing on Sasuke alone.
I'm not sure how I think personally about this idea, but I wanted a discussion of the probability going.
The idea of Naruto being born by the previous host could explain some natural affinity he has to withstanding its enormous chakra.