Seven Deadly Sins official website released a new preview for the upcoming second season of the franchise. The Seven Deadly Sins: Revival of the Commandments (Nanatsu no Taizai: Imashime no Fukkatsu) is scheduled to premiere January 6, 2018 in Japan. (Notice: The original video is region blocked to Japan.)
Anime News Network’s encyclopedia describes the show:
In a world where humans and non-humans have not yet been separated, the kingdom of Leones is protected by the Holy Knights, powerful magic users both revered and feared by the people. Supposedly the strongest, most fearsome of these knights, the Seven Deadly Sins, betrayed the kingdom and made enemies of all the other knights. Queen Elizabeth doesn’t believe this story, and sets out to find the Sins – but when she meets the first Sin at a tavern, his name is Melodias, and he’s nothing but a boy in charge of the pigs.