I'm will say some stupids things, but considering :
- Second Tsuchikage was able to split in two.
- Orochimaru was able to split is soul in pieces (almost like Horcruxes for Voldemort)
- Zetsu (one of Tobi's most loyal subordinates!!!): white one were created using the cells of Hashirama Senju Black Zetsu's origins are still unknown (maybe were created from Madara).
- Kurama allways recognized TOBI as MADARA.
Tobi: "Whether "I" survived or not is not important..!"
Now: Tobi body = Obito Body + Zetsu
Tobi mind = OBITO memorys + MADARA Parts
Note: If Kurama could be half Sealed in the dead god whit the 4th hokage (a litle bit like orochimaro) why we can't apply the same principle with MADARA/TOBI???
Note2: and why Tobi it's so interested in Sasuke?
NOTE3: this is just a thinking louder
1. Orochimaru's living resurrection technique transfers his soul into another living being, consuming their soul and taking over their body. His cursed mark which he puts on other people (Sasuke, Kimimaro, ect) implants his chakara into the person who has it, this allows his soul to tether to that person, should he die. This prevents his soul from moving on, so long as there is another individual with his cursed mark on them. If Orochimaru is unable to switch bodies, does not have a cursed mark on someone, or even becomes sealed by someone, then he dies for good.
Orochimaru did not split his soul.
2. The Tsuchikage split his body into two parts (which split his power, weakening him), allowing half of his body to become sealed so the other half could escape with his soul in it. His soul did not split.
3. Kurama's soul was left intact, while half his power was sealed.
4. Zetsu is obviously one of the many experiments that Orochimaru did on kidnapped children, using Hashirama's cells. The two halves of Zetsu are likely each part of a different child, who reacted differently and then fused into one person with two souls.
5. Tobi is likely NOT really Obito. Kakashi seems to have guessed as much in this chapter.
Next chapter will likely have Sasuke and Orochimaru showing up to the battlefield to talk to Madara.