On the official site for the animated adaptation of the Nanatsu no Taizai (The Seven Deadly Sins) manga, the production of a new animated film was announced to be titled Nanatsu no Taizai: Hikari ni Noroware Shisha Tachi (The Seven Deadly Sins: Cursed by Light). The premiere is scheduled in theaters in Japan for the next season Summer-2021 (July-September) and it is confirmed that it will feature an original story (after the end of the series) written by Nakaba Suzuki, author of the franchise. "The story will be full of elements that I did not dare to include in the main story of Nanatsu no Taizai," commented the author.
On the other hand, the manga written and illustrated by Nakaba Suzuki was published in the Kodansha publisher's Weekly Shonen Magazine between October 2012 and March 2020, with a total of 41 compiled volumes. To date it has inspired three seasons of an anime adaptation, with the fourth and final currently on air.
Nanatsu no Taizai Synopsis
The Seven Deadly Sins are a group of knights from the Kingdom of Britannia who dissolved ten years ago accused of treason and for having carried out a coup against the Kingdom of Liones and its Holy Knights. The third princess of Liones, Elizabeth Liones, was He meets the leader of the Seven Deadly Sins, Meliodas, and requests his help to rescue the honor of the Sacred Gentlemen, who are being manipulated by a demonic entity. Meliodas will then begin to reunite his companions again, while multiple threats will try to destroy the peace each time they achieve it.
Source: Comic Natalie
(c) 鈴木 央 ・ 講 談 社 ／ 2021 「劇場版 七 つ の 大 罪」 製作 委員会