As i've stated on the tittle, it's about mysterious guy who reformed a organization that has a goal to make ethernal peace, akatsuki. This is just my theory, you all are freely to post your opinion. Yes, he is Uchiha Shisui, his story of surviving will be revealed later, but im pretty sure he's not dead, Masashi Kishimoto likes to reveal already dead character in the end, just like Madara, he's not dead but some thought he was, hashirama didn't actually kill him, he managed to survive because of hashirama cell in his body. Obito, we thought he was dead in that accident, but in fact he survived and both Madara and Obito became the main villains in the series. Also itachi wasn't so sure that Shisui really died in his suicide action (he fell into a river). Of course this would not be the first time to reveals character that supposedly 'dead' but get resurrected later by either edo tensei or the character itself is actually alive, just like Madara and Obito, Mashashi's habit.. The mysterious guy looks older than Sarada and Coco, the age difference makes sense, why? because it means this mysterious guy has the same age as itachi.. who else has the same age as itachi but also has mysterious/unclear background? That would left only Shisui. This guy has unique appearance, a sharingan stiched on his eye, his eyelid seems to have closed for so long, so that it needs to be 'forced' to put a new sharingan eyeball. Shisui himself lost his eyes to danzo and itachi (danzo took one, and he gave itachi the other), i dont know where did he get those eyes, it's to be revealed later i guess, but one of possibilities is that it was madara's MS.
Is that all? no. Line of Descent. In chap 703 is mentioned that Shin calls the mysterious guy as father, Uchiha line of descent itself derived by the father (Just like SasuSaku case).
The revenge to Sasuke gives us clue.
Itachi joined Akatsuki after massacred Uchiha Clan and became double agent in that dangerous organization, akatsuki itself is actually an organization that has goal to bring ethernal peace, same as itachi's goal but in a different way. By the death of itachi at sasuke hands, it could be Shisui's mad at Sasuke because he did a suicide so Itachi could 'replace' him and bring peace but Sasuke killed him later.
In chapter 702 Shin escapes from Sasuke using Body Flickering jutsu, we can see few ninjas using this jutsu, such as Kakashi, Gaara and even Raikage. Remembering that Uchiha Shin is the son of this mysterious akatsuki leader, so it wouldn't be strange that this jutsu derived from father to son. We all know that the best shinobi at body flickering is Uchiha Shisui. Does that make sense now? It's NOT danzo, of course its not it would be foolish af if its danzo.. so what you all think?

Btw sorry for no illustration, im a bit lazy to post image lol

This post was last edited by ada***@gmail.com at 2016-10-3 13:00 This post was last edited by Rie at 2016-10-23 09:12