Kadokawa shoten has just announced the remake of this story by Go Nagai, which originally got adapted into a 25 episode anime in 1973 (!!! O_O)
There was an OVA of this series in 2006 called Kikouchi Enma (Demon Prince Enma) which featured the original characters in a mature way, yet it didn't retain the darkness and edgyness of the original.
This remake anime will be title Dororon Enma-kun Meeramera.
Here's a preview of the 1973 anime by Toei animation: