Series premieres March 20th. The new PV is here. Check out the ANN article for additional cast/staff information as well as information about its unusual release schedule. Another notable thing about the source manga is that it was done by the recently late Akira Toriyama of Dragonball fame. Synopsis from AniList:
In the far future, war has destroyed the entire Earth, leaving only a barren wasteland where the supply of water is controlled by the greedy king. In search of a long-lost lake, Sheriff Rao asked the king of the demons for help…and got the king’s son, Beelzebub, and his assistant, Thief. Together the unlikely trio sets off across the desert, facing dragons, bandits and the deadliest foe of all… the King’s army itself!
The first half of the SAND LAND: THE SERIES anime, episodes one to six, are titled “Akuma no Ooji” and is based on the film adaptation with some new footage, it will premiere alongside episode seven, which is the first episode of a brand-new arc titled “Tenshi no Yuusha”.
The movie version of the first part of this story was released last year and the series version was announced well before he passed. So, it has been in the works for quite a while. I imagine that the marketing folks are trying their best to take advantage of the connection though.