Premieres October 2024. The new PV is here. Check out the Anime Corner article for additional information. Synopsis for the source manga from AniList:
One hundred and forty years ago in Kyoto, with the coming of the American “Black Ships,” there arose a warrior who, felling men with his bloodstained blade, gained the name Hitokiri, manslayer! His killer blade helped close the turbulent Bakumatsu era and slashed open the progressive age known as Meiji. Then he vanished, and with the flow of years, became legend.
I guess that explains why season 1 was so half-assed