There seems to be some confusion regarding this so let me set the record straight: Awakening the rinnegan after acquiring EMS does NOT require senju DNA.
Why do i say this? Well let's analyze it. To begin with, i'm sure all of us can agree that the rinnegan is an eye power, correct? The Sage of the 6 Paths divided his power between his 2 sons, the Elder being the ascendant of the Uchiha and the Younger the ascendant of the Senju. But what were those powers, exactly? Here we are shown:
'The Elder was born with the Sage's eyes...'
As it has been shown numerous times throughout the manga, the Sage's eyes were in fact the rinnegan. Now, i'm aware that the Uchiha clan and even the Elder Son himself had eyes that were not quite the same as the rinnegan. My theory :
The occular jutsu known as the sharingan, whether in its 2, 3 tomoe stage or the MS and the implanted EMS were lesser forms of the ultimate eyes, namely the eyes possessed by the Rikudo. Any uchiha clan member who would push himself to the zenith of his eye powers ability, who would achieve his ultimate genetic potential would ultimately awaken the Rinnegan. So the steps towards the achieving of this goal, from the emotional trigger of watching your best friend die(Mangekyuo) and then transplanting a fellow Uchiha's MS to achieve Eternal light(EMS) were simply rungs on the ladder to achieving the Rinnegan.
How i am confident about this is because we are told that ' He had entrusted two boys with the POWER and will of the way of the ninja'. Meaning that, as the Sage was the embodiment of the ultimate ninja in power, of both body and eyes, he gave out his full or entire abilities to these two sons in the order described,i.e eyes to the Elder, body to the younger. Basically, all the abilities or potential the Sage's eyes had(=rinnegan) the Elder son had, and all the abilities the Sage's body had(=the ability to be the jinchuriki of the 10 tails) the Younger son had.
Spoiler:
Now, the confusion many people have was probably due to these pages:
Ok, Edo Madara does say that i awakened these eyes(rinnegan) shortly before my death. We all believe that he acquired Hashirama's DNA at the Valley of the End, so some people have assumed that it was due to said cells that the rinnegan was awakened. False. Notice carefully what Kabuto says on the same page:
Just as i had guessed, what awaits you when you progress beyond the sharingan.....is the rinnegan
Keyword here is 'you'. Who is this 'you' exactly that Kabuto talks about...? It can't be himself(obviously) it can't be the senju, they don't have sharingan, clearly he refers to the Uchiha. Any given uchiha who progresses beyond the 4 varieties of sharingan will ultimately awaken the rinnegan. In such a statement, had there been other pre requisites like Senju dna cells, Kabuto would have mentioned it, as he was the one who implanted the Mokuuton cells (Hashi's face) onto Madara himself. The subsequent conversation Madara has with Kabuto that people mistakenly assume implies a connection with Madara's body and his rinnegan is in fact Edo Madara simply asking Kabuto what Hashi's face is doing on his body, i.e his mokuuton ability. Remember, the senju or body powers as we've seen from the last chapter are no joke utilized to their full potential that power is as strong as the Rinnegan itself.
Why do i say this? Well let's analyze it. To begin with, i'm sure all of us can agree that the rinnegan is an eye power, correct? The Sage of the 6 Paths divided his power between his 2 sons, the Elder being the ascendant of the Uchiha and the Younger the ascendant of the Senju. But what were those powers, exactly? Here we are shown:
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'The Elder was born with the Sage's eyes...'
As it has been shown numerous times throughout the manga, the Sage's eyes were in fact the rinnegan. Now, i'm aware that the Uchiha clan and even the Elder Son himself had eyes that were not quite the same as the rinnegan. My theory :
The occular jutsu known as the sharingan, whether in its 2, 3 tomoe stage or the MS and the implanted EMS were lesser forms of the ultimate eyes, namely the eyes possessed by the Rikudo. Any uchiha clan member who would push himself to the zenith of his eye powers ability, who would achieve his ultimate genetic potential would ultimately awaken the Rinnegan. So the steps towards the achieving of this goal, from the emotional trigger of watching your best friend die(Mangekyuo) and then transplanting a fellow Uchiha's MS to achieve Eternal light(EMS) were simply rungs on the ladder to achieving the Rinnegan.
How i am confident about this is because we are told that ' He had entrusted two boys with the POWER and will of the way of the ninja'. Meaning that, as the Sage was the embodiment of the ultimate ninja in power, of both body and eyes, he gave out his full or entire abilities to these two sons in the order described,i.e eyes to the Elder, body to the younger. Basically, all the abilities or potential the Sage's eyes had(=rinnegan) the Elder son had, and all the abilities the Sage's body had(=the ability to be the jinchuriki of the 10 tails) the Younger son had.
Spoiler:
This is why i believe Naruto will become the host of the Juubi and Sasuke will acquire the Rinnegan.
Now, the confusion many people have was probably due to these pages:
You must be registered for see images
You must be registered for see images
Ok, Edo Madara does say that i awakened these eyes(rinnegan) shortly before my death. We all believe that he acquired Hashirama's DNA at the Valley of the End, so some people have assumed that it was due to said cells that the rinnegan was awakened. False. Notice carefully what Kabuto says on the same page:
Just as i had guessed, what awaits you when you progress beyond the sharingan.....is the rinnegan
Keyword here is 'you'. Who is this 'you' exactly that Kabuto talks about...? It can't be himself(obviously) it can't be the senju, they don't have sharingan, clearly he refers to the Uchiha. Any given uchiha who progresses beyond the 4 varieties of sharingan will ultimately awaken the rinnegan. In such a statement, had there been other pre requisites like Senju dna cells, Kabuto would have mentioned it, as he was the one who implanted the Mokuuton cells (Hashi's face) onto Madara himself. The subsequent conversation Madara has with Kabuto that people mistakenly assume implies a connection with Madara's body and his rinnegan is in fact Edo Madara simply asking Kabuto what Hashi's face is doing on his body, i.e his mokuuton ability. Remember, the senju or body powers as we've seen from the last chapter are no joke utilized to their full potential that power is as strong as the Rinnegan itself.