So we got this seal on Naruto and.....
So we all know that Minato placed a seal on Naruto after his birth to seal the Kyuubi within naruto for a reason not yet explained or revealed. A seal that allows the Kyuubi's chakra to slowly mix with Naruto's own chakra so that it becomes his. As a result of this, Naruto's own chakra has become very strong and resilient to the Kyuubi chakra, which has been described as wreaking of malice and hate. And how naruto own body acts as a sort of skeleton, presumably with his own chakra protecting his body.
But what if this is exactly what Minato wanted?
Other Host of Bijuus dont any of there seals revealed. Naruto's seal was speciifically made to mix Kyuubi chakra with his own. I believe that Minato did this in order to destroy the Kyuubi. How? By having it becomes naruto's own chakra. By constantly mixing Naruto's and the Kyuubi's chakra together to Make its Narutos, it would make sense that eventually it would erode way and becomes Naurto's.