KB was erased at the end of story to only pop-up in 700.
But I know what you mean. There could be a lot of good plot moments regarding Jinchuriki's and their personality's (let's say arcs of flashbacks with Akatsuki's hunt?).
I always thought Jinchuuriki was a missed opportunity. I mean it's not that needed, but feel like there could have been good story to be told with them.
I always though that if Naruto knew some of the jinchuriki then his fight against the Akatsuki would become more personal and the whole "bring back Sasuke " plot could have a little less focus, because Naruto's character would have other priorities
Like, wouldn't be cool if during the 2 year training Naruto met some Jinchuriiki and became his friend? Akatsuki could eventually get him with Naruto failing to save him, this would spark some kind of new determination for the protagonist
Gaara could serve this purpose, but he was too important ( and popular )for the story to die
Edited by Nar123, 05 February 2015 - 02:13 PM.