The two compilation specials will air on May 4th and 5th. The new PV is here. Check out the ANN article for more information. Synopsis of the source manga from AniList:
The setting is Taisho era Japan. Tanjirou is a kindhearted young boy who lived peacefully with his family as a coal seller. Their normal life changes completely when his family is slaughtered by demons. The only other survivor, Tanjirou’s younger sister Nezuko, has become a ferocious demon. In order to return Nezuko to normal and get revenge on the demon that killed their family, the two of them depart on a journey. From a young talent, an adventure tale of blood and swords begins!
I mean, it’s a good story and all, but the last season was kinda boring so can’t see how this would be enjoyable to watch…and this is coming from someone who has read the manga and loved it.
Can’t stop the hype train though…