..... What if it didn't happen ?
i have read theories about Madara being alive and obito and even the forth and that orochimaru might not be dead and it seems that people can't stay dead in naruto ...
So what if the whole clan slaughter is just mass mangekiou saringan or a set up or what ever and the whole freaking clan is about to reveal itself and declare their ambition for world domination or something screwed up like this ?
