Back in October, a Devilman themed commercial started advertising high speed internet in Japan.
If you noticed, the background music is an opera-esque re-arrangement of the original Devilman theme. The official site also offered a new Devilman novel on its website was regularly updated till all chapters were out. It also had 3 Devilman audio tracks accompanying the novel.
On the final chapter, Nagai did an illustration of Nuro Devilman.
- Nuro Devilman by Go Nagai:
Today, the site released its final update. A special. It can be seen here: