I don't know about the bullet scenario. She has saved him from a gunshot, poison, helicopter crash, and stayed with him when their car went over the cliff. Yes, it is clear, as the pandit said, as long as Naku is with him, Dutta is safe. I'm not sure we need another example of this. Also, we know Naku has time and again consistently shown her love for Dutta, and most recently, with her words and faith in her pati.
I doubt they would have Naku get shot for Dutta -- why? Because we expect it, it "fits" with the pattern and Naku's unconditional love for Dutta. The CVs are masters at their game, always surprising us...not always pleasantly, but for the most part they have delighted us. But I will also say that I could be wrong--as the diya flickers, Naku runs out, scared for Dutta. But her taking a bullet, like Jagtap did for them only two weeks back seems unoriginal.
I also doubt the More kidnap angle will ever come to pass for the same reason, because how many times can the poor girl be kidnapped?