Season 3 should actually be its own Show "Sengoku Basara: End of Judgement" It is just like Fullmetal Alchemist / Fullmetal Alchemist Brotherhood, Steins; Gate, Steins;Gate 0, etc. It is it's own complete indepenedent retelling of the story. It aird in 2014. Evicdences: https://www.ntv.co.jp/english/pc/2014/05/sengoku-basara--end-of-judgement-.html <-- Authorative this is the actual producer of the tv series. https://en.wikipedia.org/wiki/Sengoku_Basara:_End_of_Judgement https://www.funimation.com/shows/sengoku-basara-end-of-judgement/?qid=None https://www.anime-planet.com/anime/sengoku-basara-end-of-judgement