How Minato Might Save Naruto
Well, I just made a quasi-serious post about this idea, and now I think it's a possibility:
Reika no Jutsu
This is based off of the assumption that Tobirama can use this and Minato bases one of his signature techniques off of Tobirama's Hiraishin, so why not this? And recently, Tobirama stated that he can use a variation, if not the exact, jutsu:
And I believe that this could be possible foreshadowing to Minato eventually using the jutsu to save Naruto, since the option of transferring Yin Kurama has been closed.