Fans of Blue Exorcist ( Ao no Exorcist ) did not expect the announcement of the anime's continuation in 2022 . Although at that time it was not known whether it would be a reboot or a third season , although now, a small clue has confirmed that, in fact, it is a continuation.
Blue Exorcist – Rumors confirm continuation of the series and not reboot
Therefore, the Aniplex Online Fest begins on September 10th with several announcements scheduled. One block is set for the Blue Exorcist franchise, but it is listed as Blue Exorcist: Shimane Illuminati Saga. This title is more than enough to confirm that the new project announced is a third season, as “Shimane Illuminati Saga”, or “Illuminati Arc”, is the sixth story arc of the original manga
Synopsis:
The Blue Exorcist manga debuted on Jump SQ. in 2009. Finally, the first season arrived in 2011 through the animation studio A-1 Pictures with 25 episodes.
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Source: MyAnimeList