This theory is to make people think instead of jumping to conclusions.
First of all if Sasuke was to die i highly doubt that would end the transmigration for a few simple reasons.
1: if you remember back in part 1 kakashi said that the sharingan was basically an evolution of the byakugan.
2: if that is true whats to stop indra from transmigrating once again to a hyuuga and evolving a byakugan to a sharingan.
3: New sharingan being born and tablet being read again by indra transmigrate
4: Rinnegan being hunted once again and problem starting all over again
With these points out the only way i can possibly see naruto ending this feud once and for all is by doing one of 3 things.
Either
1: Naruto has to seal Sasuke with Indras Transmigrated soul away permanently (might be where the amber purifying pot comes into play)
2: Naruto plays chakra tug of war with indras soul and magnet rasengans it (this here would allow sasuke to move on or die without transmigration happening.)
3: Or Naruto/Ashura and Sasuke/Indra collides with their rasengan and chidori at such force that it knocks the transmigration out leaving Naruto and Sasuke just as themselves while the transmigration souls get sent to another dimension to fight as chakra spirits for all eternity.
First of all if Sasuke was to die i highly doubt that would end the transmigration for a few simple reasons.
1: if you remember back in part 1 kakashi said that the sharingan was basically an evolution of the byakugan.
2: if that is true whats to stop indra from transmigrating once again to a hyuuga and evolving a byakugan to a sharingan.
3: New sharingan being born and tablet being read again by indra transmigrate
4: Rinnegan being hunted once again and problem starting all over again
With these points out the only way i can possibly see naruto ending this feud once and for all is by doing one of 3 things.
Either
1: Naruto has to seal Sasuke with Indras Transmigrated soul away permanently (might be where the amber purifying pot comes into play)
2: Naruto plays chakra tug of war with indras soul and magnet rasengans it (this here would allow sasuke to move on or die without transmigration happening.)
3: Or Naruto/Ashura and Sasuke/Indra collides with their rasengan and chidori at such force that it knocks the transmigration out leaving Naruto and Sasuke just as themselves while the transmigration souls get sent to another dimension to fight as chakra spirits for all eternity.