Nagato with rinnegan revive thousands of people he only died because he was already exhausted this means this Jutsu doesn't cost life So since it's looking like Naruto will die after fighting Kawaki.It could be possible that Sasuke revive him If he has that reviving Jutsu and maybe that's the reason why Kishi is trying to create hype by killing Naruto but in the end Naruto will be revived