What i think

[fastest shinobi]

When Madara and Hashi were fighting and Hashi jumped off the wood thing that was pushing the nine tailes back Madara used Izanagi on Hashi causing him to think he killed Madara and I think Madara learned it from the Uchiha's stone after getting EMS and that might be what sasuke will learn in the future and PS or Izanami but I think Sasuka will go back to the Uchiha's stone and read it with EMS and learn
Izanami or and Izanagi that's just a thought

 

[Uchihabrat1560]

Sasuke is already in Naka shrine... he would read that again, probably...Wouldn't izanagi lead to loss of sight again?

 

[SoulKiller]

Nobody cares what you think

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[SenseiMartian]

Except Madara retains his eyesight meaning that he used neither Izanami or Izanagi. Sasuke could learn them, but at this point he doesn't really need it, and the side effects are too costly relative to the temporary gain in my opinion.

 

[SilverDuck]

Have you read the manga? It shows that Madara put Hashi's cells on the very same wound we just saw him receive. "It didn't do anything... At first.... Right at the end of my lifespan, I awoke the Rinnegan". That who bit shows him putting the Senju semen in his stab would. It was him, not a clone, not genjutsu.