With Kurama being extracted from him, Naruto has suffered a fatal blow. However, his death was planned by Kurama and is necessary. Naruto will not die immediately, he's too strong willed for that, plus the Uzamaki vitality in him. Gaara will transfer some of Shikaku's chakra into Naruto before he dies, but it won't be enough to save him. Bee will also transfer some of the eight-tails chakra to assist. In the end Naruto will pass away...only to be resurrected as the Sage of Six Paths. He must fulfill the prophecy and its the only way to defeat Madara. Naruto can't simply get all the tailed beasts' chakra and poof he is So6P, he must transform. By having a temporary death it will allow him to reawaken with new powers akin to the true Sage.