Hinata could save Naruto
Well, it's very well in the realm of possibilities. I mean, Neji once stopped Hinata's heartbeat with gentle fist back in their fight in the chunnin exams, so it's very possible that Hinata may be able to do the reverse of that and restart Naruto's heart beat in a similiar fashion. The last we see her, she's thinking "Neji asked me to protect Naruto", so that very well could be clear foreshadowing that she's gonna save him. In fact, I think this is honestly the most likely scenario aside from Minato giving Naruto the other half of the nine tails.
It would be interesting though if Naruto and Sasuke met up with Neji and Itachi for some time, kinda like what happened with Kakashi and his father
Oh, and if you disagree, feel free to post your own thoughts on how you think Naruto, or even Sasuke,may be saved.