Actually, yes there is more hints out there.
For example, in Kakashi gaiden Obito uses the analogy "like water and oil", which is later used by tobi
when he tells Sasuke about the history of the Senju and the Uchiha, or the fact that kakashi gaiden
would have served no purpose, if it was about the distant past that has no relation to the present.
From my observation, Kishis flashbacks usually serve some hidden purpose that revelas itself later in the story,
so that in and of itself should have been a hint, too.
i don't know for sure, but imho no. it doesn't seem planned.
all these are
hints or maybe
clues. the problem is that there were hints or clues suggesting sth different. and that's the thing about hints and clues, they are not
values in the story. and by values i mean basically facts. or to be more precise how facts may or may not affect the story.
for example: Sakura has pink hair that's a fact. Hinata has the byakugan, also a fact. the byakugan is a dojutsu, that's a value in the story. we all know that there are three major dojutsu and one of them is the byakugan.
depending on the importance of the value, the story adapts accordingly. for example, the byakugan is a not as important to the story as is the sharingan.
regarding all the hints about Tobi being Obito in the story: none of them is particularly important given that there were equally as many hints about sth else. and none of them for either Obito or Madara as a possible identity was a fact or a value.
which is what i meant in my post:
two interconnected values are not the same as some random hints.
eg. the analogy of oil and water is a very good one and connects Obito to Tobi and does so pre-revelation. (
another important aspect: the two values have to preexist the third one, or else it is pointless for obvious reasons)
BUT there are also hints which at the time linked Tobi to Madara, for example all the speeches about Hashirama.
now that we know the truth the hints about Tobi=Madara are irrelevant and false, but before the revelation the importance of all hints had the same impact.
two interconnected values though, which would be a proof that Tobi=Obito was preplanned, would take place before the revelation of the identity and could be sth like this:
Obito is/ has (x) fact. (x) is/ has that value in the story.
> Obito has spiky hair. spiky hair has some credibility as a value in a shounen i guess but then again if Obito was the long haired Madara, meaning he let his hair grow... sb else could had cut his hair.
> Obito has six fingers (
completely hypothetical), that's a fact. Tobi had six fingers too, also fact. if people were making fun of him because of that characteristic as Obito in Konoha and then as Tobi in Akatsuki, then here is the value of it in-story.
about the Kakashi Gaiden, personally i could see it as a stand alone story explaining Kakashi's story, the same way Yahiko was important to Nagato and Konan and they were even using his body for one of the paths, but the guy was long dead.