this article kinda blew my mind. how come no naruto fan so far has researched this and guessed maybe the "tobi is a good boy" thing means "sarutobi is a good boy", which makes Tobi the legendary sarutobi sasuke?
except for the fact he uses obito's body to incarnate as madara's big brother. I always believed Sasuke is the true reincarnation of madara. that article explains everything.