So Uchihas use there sharingan to control the fox.
And we now know for a fact (4th told naruto when naruto went 8tails against pain) that tobi was controlling the fox 16 years ago.
So...Yondaime Hokage sealed half the foxes chakra into naruto, half into the death god.
My point is maybe tobi lost his moon eye (left eye) because when yondaime sealed the kyuubi, it also sealed tobis sharingan which was controlling kyuubi.
We all know that jutsus and seals are all interlinked chakra systems etc.
In theory if the fox was being controlled, it was being controlled by tobi/madaras chakra, and as the fox was sealed, logically this means the chakra of tobi/madara was sealed too.
Maybe the moon eye plan is simply to get his left eyes power back somehow.
And we now know for a fact (4th told naruto when naruto went 8tails against pain) that tobi was controlling the fox 16 years ago.
So...Yondaime Hokage sealed half the foxes chakra into naruto, half into the death god.
My point is maybe tobi lost his moon eye (left eye) because when yondaime sealed the kyuubi, it also sealed tobis sharingan which was controlling kyuubi.
We all know that jutsus and seals are all interlinked chakra systems etc.
In theory if the fox was being controlled, it was being controlled by tobi/madaras chakra, and as the fox was sealed, logically this means the chakra of tobi/madara was sealed too.
Maybe the moon eye plan is simply to get his left eyes power back somehow.