Board Thread:Theories and Speculation/@comment-1512913-20150827121154

The whole transplant thing is very weird, especially when it comes to Uchiha. As we know, Madara was given Izuna's eyes and Sasuke took Itachi's eyes. In both cases it resulted in the Eternal Mangekyou Sharingan and the Rinnegan eventually. So obviously: "Madara's Sharingan/Rinnegan" are actually Izuna's eyes and "Sasuke's Sharingan/Rinnegan" are Itachi's eyes of course.

Nagato and Obito retained Madara's Rinnegan despite having had no Asura and Indra/Hagoromo chakra/s in their bodies, meaning the chakras are present in the transplanted eyes themselves and permanently because of some weird logic and physics, even though one could suppose they would run out in time, but nope.

In that case, "Madara's" eyes are a combination of 5 chakras: Madara's own chakra, Izuna's chakra, Hashirama's chakra, Indra's chakra, Asura's chakra. But lets simplify it into 4: Madara's, Izuna's, Hashirama's, Hagoromo's.

Sasuke is a strange one, having only one Rinnegan and there are still arguments if it's a result of:
 * Asura's chakra in Hashirama's cells given to him from Kabuto, which in itself is being disputed if true
 * Asura's chakra given to him from Edo Hashirama
 * Hagoromo's chakra directly given to him
 * Combination of any of the above

But lets simplify it too so we don't have to ponder about that, it's also 4 then: Sasuke's chakra, Itachi's chakra, Hashirama's chakra, Hagoromo's chakra.

Makes me wonder what would happen if those eyes were to be transplanted back to their original owners/users, Izuna and Itachi respectively. Would the pattern change? Would they retain the Rinnegan? If Nagato and Obito are any indications, then yes for the second one.

This is just my speculation, but since Izuna and Itachi respectively are the original and true owners of their eyes, the Eternal Mangekyou and Rinnegan power and usage in their possession should be superior to Madara's and Sasuke's, just like Madara's was superior to Nagato and Obito's.

In other words, EMS/Rinnegan Itachi > Sasuke, EMS/Rinnegan Izuna > Madara. I would pay to see those GODS happen, not to mention to see Izuna's and Itachi's Eternal Mangekyou designs, probably the reverse of Madara's and Sasuke's or something, anyone's got good photoshop skills? 