First off, this thread has become significantly longer than I intended so I'm going to include a synopsis at the end, but please take the time to read the whole thing if you can. I've included manga scans and thrown in a little humor to try to keep your guys' attention 
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Now I think it has been made clear recently that Tobi has all of Obito's memories, or at least has all of his memories since becoming a part of team Minato. He seems to know about Obito and Kakashi's relationship before their final mission together, indicated by his seeded resentment towards Kakashi. He also obviously knows about Obito's death and the mission connected to it. Not to mention he knows everything about Obito's MS which means he must have taken the eye immediately after the boy's death and on top of that, knows a lot about the Uchiha clan's family history. The bottom line I'm getting at here is that Tobi not only seems to have Obito's memories, but also the memories of more seasoned Uchiha clan members.
To be more specific, from what I can gather from the manga, Tobi also has all of Madara's memories, or at a minimum, his brother Izuna's. I mean one of the key factors that kept the Madara theory around for so long was that Tobi had such in depth knowledge of Madara and the history of the Uchiha clan that it was pretty ridiculous to think he could be anyone other than Madara, or perhaps his brother Izuna. The bottom line is that Tobi has memories of someone greater than or equal to the age of Madara/ Izuna, or was drilled on the subject very intensely by someone with the same level of experience, over a long period of time.
So on top of seemingly being a 110 year old grandpa, Tobi also shows indications of a 30 some year old man who might be using the body of a 12 year old nobody....... The real point I'm getting at here is that there must be a key factor connecting these vast reserves of knowledge to the person we know as Tobi. I think that anyone could have become Tobi considering there has to be an outside source informing / feeding information to him.
Now I'm sure a ton of you are screaming that the connection between the two has got to be Zetsu. I mean we know that Tobi is largely comprised of Zetsu material / Hashirama DNA, whichever you prefer, and everyone knows that IF Obito did survive his life threatening experience, or if his body was salvaged from the scene, it was because of Zetsu. But there is a huge hole in this Zetsu idea that was revealed to us recently:
We know for a fact that if Zetsu clones a person by touching them and storing their genetic information, he CANNOT copy their memories. If Zetsu could copy/ clone a person's memories, he would have known that Ton Ton was a pig when he cloned Neji. Basically what I'm saying is that If Tobi does have memories from more than one person, it could not logically be because he is some form of Zetsu clone.
Buuuuuut, we do know that Zetsu can in fact SHARE MEMORIES with Tobi:
This topic has always been very important to me and I feel that discovering the secrets behind Tobi viewing Zetsu's 'recordings' has always been a key to figuring out Tobi's past. Now I consider these 'recordings' simply memories; or at least memories of a being created or designed for the purpose of passing them to someone else. Now this part is not new at all, but perhaps Black Zetsu is comprised of DNA comparable to Tobi's, perhaps strictly Uchiha DNA, and perhaps since Tobi is comprised of so much Zetsu DNA that he can essentially meld or attach to Zetsu in order to share these 'recordings'.
Now I know that Tobi and Zetsu 'melding together' is not a pleasant thought, but how else could he share those recordings? I doubt black zetsu can project the images from his 'golden byakugan' onto a projector screen while tobi has some popcorn and relaxes. I really don't see any other explanation other than them forming some sort of physical contact.
From all this, I can only begin to conclude that Tobi is someone between the age of Izuna and Obito who was manipulated or perhaps forced into service by Madara to serve him. I think Zetsu has perhaps been 'sharing memories' with Tobi for as long as he has been Madara's servant. I also feel that Zetsu must have been keeping tabs of Minato and his team in addition to infiltrating the area that Obito died. I think that is why Tobi knows so much about Obito, because Zetsu shared those memories with him. I also think that Zetsu may have preserved a number of bodies to help keep Tobi alive. Among these, I think both Obito and Madara's bodies were preserved and perhaps have been used or are being used by Tobi along with Hashirama's DNA.
One final note before I make the synopsis:
Phew! Anyway, thank you guys for reading! This topic has really got me excited for the next few weeks of the manga! Feel free to discuss and point out mistakes or flaws in my post, and for all you lazy people, here is the synopsis I promised:
SYNOPSIS:
1. Tobi seems to have the memories of both Obito and Madara and possibly those of many other people, Izuna included.
2. Zetsu cannot copy a person's memories along with their appearance, making me believe that Tobi is not a full on Zetsu clone with someone else's DNA spliced in.
3. Considering Tobi can 'view' Zetsu's 'recordings' and considering Tobi is comprised largely of Zetsu material, I'm under the impression that Tobi can 'meld' with zetsu and share his 'memories'. This would theoretically enable Tobi to have knowledge of everything Zetsu does, as far back as Zetsu's creation.
4. I feel that Zetsu was watching Minato, and consequently, Obito during their training and missions. I also feel that Zetsu harvested Obito's sharingan from the scene and has perhaps been using people's body's, like Obito's or perhaps even Madara's, to keep Tobi alive longer.
.Now I think it has been made clear recently that Tobi has all of Obito's memories, or at least has all of his memories since becoming a part of team Minato. He seems to know about Obito and Kakashi's relationship before their final mission together, indicated by his seeded resentment towards Kakashi. He also obviously knows about Obito's death and the mission connected to it. Not to mention he knows everything about Obito's MS which means he must have taken the eye immediately after the boy's death and on top of that, knows a lot about the Uchiha clan's family history. The bottom line I'm getting at here is that Tobi not only seems to have Obito's memories, but also the memories of more seasoned Uchiha clan members.
To be more specific, from what I can gather from the manga, Tobi also has all of Madara's memories, or at a minimum, his brother Izuna's. I mean one of the key factors that kept the Madara theory around for so long was that Tobi had such in depth knowledge of Madara and the history of the Uchiha clan that it was pretty ridiculous to think he could be anyone other than Madara, or perhaps his brother Izuna. The bottom line is that Tobi has memories of someone greater than or equal to the age of Madara/ Izuna, or was drilled on the subject very intensely by someone with the same level of experience, over a long period of time.
So on top of seemingly being a 110 year old grandpa, Tobi also shows indications of a 30 some year old man who might be using the body of a 12 year old nobody....... The real point I'm getting at here is that there must be a key factor connecting these vast reserves of knowledge to the person we know as Tobi. I think that anyone could have become Tobi considering there has to be an outside source informing / feeding information to him.
Now I'm sure a ton of you are screaming that the connection between the two has got to be Zetsu. I mean we know that Tobi is largely comprised of Zetsu material / Hashirama DNA, whichever you prefer, and everyone knows that IF Obito did survive his life threatening experience, or if his body was salvaged from the scene, it was because of Zetsu. But there is a huge hole in this Zetsu idea that was revealed to us recently:
You must be registered for see images
We know for a fact that if Zetsu clones a person by touching them and storing their genetic information, he CANNOT copy their memories. If Zetsu could copy/ clone a person's memories, he would have known that Ton Ton was a pig when he cloned Neji. Basically what I'm saying is that If Tobi does have memories from more than one person, it could not logically be because he is some form of Zetsu clone.
Buuuuuut, we do know that Zetsu can in fact SHARE MEMORIES with Tobi:
You must be registered for see images
This topic has always been very important to me and I feel that discovering the secrets behind Tobi viewing Zetsu's 'recordings' has always been a key to figuring out Tobi's past. Now I consider these 'recordings' simply memories; or at least memories of a being created or designed for the purpose of passing them to someone else. Now this part is not new at all, but perhaps Black Zetsu is comprised of DNA comparable to Tobi's, perhaps strictly Uchiha DNA, and perhaps since Tobi is comprised of so much Zetsu DNA that he can essentially meld or attach to Zetsu in order to share these 'recordings'.
Now I know that Tobi and Zetsu 'melding together' is not a pleasant thought, but how else could he share those recordings? I doubt black zetsu can project the images from his 'golden byakugan' onto a projector screen while tobi has some popcorn and relaxes. I really don't see any other explanation other than them forming some sort of physical contact.
From all this, I can only begin to conclude that Tobi is someone between the age of Izuna and Obito who was manipulated or perhaps forced into service by Madara to serve him. I think Zetsu has perhaps been 'sharing memories' with Tobi for as long as he has been Madara's servant. I also feel that Zetsu must have been keeping tabs of Minato and his team in addition to infiltrating the area that Obito died. I think that is why Tobi knows so much about Obito, because Zetsu shared those memories with him. I also think that Zetsu may have preserved a number of bodies to help keep Tobi alive. Among these, I think both Obito and Madara's bodies were preserved and perhaps have been used or are being used by Tobi along with Hashirama's DNA.
One final note before I make the synopsis:
I feel that since Zetsu was almost certainly created after Madara lost to Hashirama at VOTE, that the evidence does in fact point to Izuna as being the top candidate for Tobi. Considering Tobi knows a lot about Madara and Izuna's past BEFORE Madara lost to Hashirama and because Zetsu would not have been able to share memories of a person BEFORE he was created... just a thought.
Phew! Anyway, thank you guys for reading! This topic has really got me excited for the next few weeks of the manga! Feel free to discuss and point out mistakes or flaws in my post, and for all you lazy people, here is the synopsis I promised
:SYNOPSIS:
1. Tobi seems to have the memories of both Obito and Madara and possibly those of many other people, Izuna included.
2. Zetsu cannot copy a person's memories along with their appearance, making me believe that Tobi is not a full on Zetsu clone with someone else's DNA spliced in.
3. Considering Tobi can 'view' Zetsu's 'recordings' and considering Tobi is comprised largely of Zetsu material, I'm under the impression that Tobi can 'meld' with zetsu and share his 'memories'. This would theoretically enable Tobi to have knowledge of everything Zetsu does, as far back as Zetsu's creation.
4. I feel that Zetsu was watching Minato, and consequently, Obito during their training and missions. I also feel that Zetsu harvested Obito's sharingan from the scene and has perhaps been using people's body's, like Obito's or perhaps even Madara's, to keep Tobi alive longer.
