Okay with the current rate of the manga going on, and kabuto's pawns being sealed or eventually being sealed I couldn't help but think about Kabuto's Trump Card...
So it dawned on me to rethink it all and this is what I've come up with
In the valley of the End where both Sasuke and Naruto thought the two statues of both Madara vs Hirishama (1st Hokage) they each face each other in a peace stance not battle stance so my question is why would someone build a statue of enemies being in peace?
I believe when Madara fought the 1st Hokage he couldn't defeat him nor could the 1st Hokage defeat Madara knowing that the battle would just end in both of them own death they called a truce.(this scenario is being repeated with Naruto vs Sasuke)
Now Madara young brother which I believe to be "Tobi" didn't stand for that idea he sought not to have the Uchiha in coop with the Senju but ahead of them and disagreed with he's brother's way tried to rally the other Uchiha but they didn't follow him because Madara was the leader and he wasn't as strong as he's brother so he left and sought out means of becoming stronger than all of them, which lead him to stealing the 1st Hokage DNA and creating ZETSU.
During the story of Itachi you see Itachi meeting with Madara who assisted Itachi in the killing of he's own clan, why would Madara do this? I believe it was Tobi Madara younger brother which again was seeking out he's revenge against he's clan.
Zetsu which i believe to have been the birth from numerous tests on creating a regeneration technique which is what Tobi uses to regenerate limbs or parts of he's own body.
Now Naruto's mother and the 1st Hokage wife was from a clan which had very long life expectancy I believe that Tobi had grasped another technique and there DNA and implanted it withing himself to which has had him lived so long.
Now the infinite sharingan was never obtained by any Uchiha that was a lie, Sasuke now being the only one to every obtain such I don't really see of a way or means that the current Madara as said to be could have lost that its an EYE that never goes blind.
I believe the real Madara did sustain injuries from he's fight with Hirishama and he really was losing sight from he's eyes and he slowly died but as to where he was buried? I believe it to be the one place Tobi would never venture but in the Hidden leaf, just as there is stone tablets hidden deep below the city talking about the Sage i believe that is where he was buried.
Since Tobi could never get he's brothers eyes when he helped Itachi slaughter all the other Uchiha he stole there eyes which is why he has such a vast amount in he's hideout but no of them could give him an Infinite Sharingan only he's brothers. Which he could get because he doesn't know where he's brother was buried.
So he devised a plan to gain a power which came close enough the "Moon's Eye Plan" and since he is (Tobi) a master of genjutsu he is seeking to use that to control everything as you can see he not a very direct approach fighter.
Okay and what closes out this idea???
In the manga 490 kabuto meets with Madara(TOBI) and wants to join forces and then just before Madara(TOBI) approaches a dissolve he brings up another coffin which he considers he's TRUMP CARD! I believe this coffin to be the Real MADARA I mean who else can it be? Since all the most powerful Shinobi have been resurrected and to the shock of Madara(TOBI) too see "He's brothers face again" He's Eternal Rival just like Sasuke & Itachi.
**Cannot post link please view Page 6 of Manga 490**
Final two comments go to the screen above
Kabuto : I knew you were reasonable, Uchiha Madara you are really in a league of your own
[He knows he has the real Madara but he doesn't know who is the fake one]
Madara (Tobi) : Wise Guy, I'll reformulate my plan to account for your battle power
[He has been found out a impostor, and now has to think of how to defeat Kabuto if he has to go against the real Madara who is He's Brother and knows all he's fighting style/technique's]
So I implore for your comments on my theory...
Uchiha Madara at Akatsuki being actually Tobi Madara's younger brother....