Well there is a novel Konoha Steam ninja scrolls, That's completely based on Mirai, Kakashi and Guy. They even have new character Jashin follower Ryuk. Hidan is dead it seems.
that's not what this said.
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On Akatsuki - Kobayashi then goes on to say that when the Akatsuki were first introduced [when they were as shadows during their meetings] it was really exciting. Kobayashi says his favorite pair were Hidan and Kakuzu, to which Kishimoto agrees, saying Hidan was his favorite overall. Kobayashi says that they gave off a real sense of danger and malice. He also says that the concept of them both being immortal, albeit for different reasons, was really interesting. Kishimoto said he was worried at first about how he was depicting Hidan, who stabbed himself then said it felt good. Kobayashi says that it’s also the case of the damage he inflicted on Asuma.
On censorship scenes - Kobayashi then brings up the scene where Shikamaru is smoking Asuma’s cigarette, saying that it gave off the feeling of a boy becoming an adult. Kishimoto said he didn’t think they’d be able to show this in the anime. Kobayashi admits he was worried when this first came out. Kishimoto said that he thought he’d be told he can’t show a minor smoking [in the manga], since manga regulations are very strict. He had a meeting with his editor about whether he should change it or not, and in the end his editor told him to not worry about it and just try and go through with it anyway. If the people above wanted to edit it they would. Kobayashi brings up a scene where Hidan’s head is lopped off, and Kishimoto comments that the editing department told him to add black bars at the side for censoring.
Kobayashi asks if Hidan is still buried underground, and Kishimoto says he is. Kishimoto wondered whether to put him in the war, but in the end he didn’t want to have even more characters to draw, so he didn’t.
Kobayashi then brings up the scene where Shikamaru is smoking again and he starts crying and flicks the cigarette away, Kobayashi comments that for a shounen series this was an incredibly serious scene. Kobayashi asks if he likes this kind of stuff, and Kishimoto says that surprisingly he does like these kinds of movies etc. He can’t out too much of this kind of thing into a shounen series, but he put in a little bit of something he finds interesting.
That being said I don't think Hidan is coming back.
