Cliffhanger. I was wondering when this would happen. You can't always have good things, and moments like these make the story interesting. So, Naruto is captured....yet again. His bijuu chakra will be drained...yet again. This is really engaging. This proves Naruto is not perfect; he's not super and there are still glaring holes that need to be fixed. Teamwork can defeat a superior opponent...(sometimes) along with a good plan.
That scene at the end makes me think that's Naruto far afar into the future but for it to be an Iwa lover that kills him despite what he believes he achieved hurts a bit.Hopefully the next chapter elaborates more. I also understand what you meant for Kushina: one step forward, two steps back. And Fuka makes the mistake of absorbing his chakra directly: link start. THough I'm really sure this one will require work.
Til next time