Nope. He meant if naruto and sasuke both fight against each other. Naruto's plot armor will get a power up soon.
But maybe naruto was wrong, except the dying part.
That might a possibility but hey, i don't think he'll die right now, they can't really touch current madara, they're kind of out of chakra due to overused of their best techniques. Their only hope is some power up (naruto/sasuke).
In the end of the chapter, It was mentioned that Their hearts stopped beating. So im guessing they died.