Im bored and ran across this so w/e.
We all know that when transfering MS eyes that one not only never loses light from the eyes again, but a whole new doujutsu is awakened from the transfer as well.
Well, we know kishi likes using japanese myths and folklore and this certain deity just happens to be the father of Amaterasu, tsukuyomi and sasanoo so it would make sense IMO that he be the final jutsu of the MS.
^Izanagi (the ability of creation or death) Like an atavism of the Rinnegan the SG evolved from exept its alittle different probably.
Or perhaps the way kishi will use it is Izanagi will be the power of creation and his ex wife http://en.wikipedia.org/wiki/Izanami
Izanami will offer the power of death just as the strory (Izanami claimed she would kill 1000 people, meanwhile Izanagi replied then he'd create 1500 People)
Like how itachi who was good had a pure sasanoo which could correlate to Izanangi (creation) when he got EMS, but because sasuke is turning bad and has a dark sasanoo he would get Izanami (death) whne getting EMS.
Madara awakening Izananmi could explain how he cheated death. Also, madaras true objective could actually be to obtain Izanagi (creation) as well by having sasuke turn good then transfer itachis eyes awakening Izanagi then stealing them from sasuke. Then Madara could use the ability to recreate himself as he was when he fought harishima or something like that.
Izanagi plus Izanami would equal a badass final villan.
Im not exactly sure, but its interesting IMO.
By chance kishi skips Izanagi and Izanami then these guys would be next on the list for the final MS jutsu.
Apparently there are three gods of creation and each representing a different level of creation.
1rst Amenominkanushi:is central control of creation.
! not really sure.http://en.wikipedia.org/wiki/Amenominakanushi
2nd Takamimusubi: is high creation.
3rd Kamimusubi: is Divine creation.
All three are known as Zoka sanshin (three kami of creation).
Now, u should notice there just happens to be no other info on the 2nd and 3rd kami of creation just as there was no more info but the mane of Juubi(the tentails) Okami when I found him as well. Kishi used him.
Anyways to cooralate takamimusubi and kamimusubi to the MS. They both represent different levels of creation. Perhaps when transfering MS eyes to get the EMS u awaken Kamimusubi (divine creation). However, its a limited jutsu which puts Madara where he is now, half dead, half alive it seems. Perhaps by retransfering eyes (madara wants sasukes MS eyes) he could awaken Takamimusubi and completly bring himself back to life and truely become Immortal.