http://gematsu.com/2017/05/el-shaddai-director-announces-turn-based-rpg-lost-child-ps4-ps-vita
PS
Update:
The next game from the staff behind El Shaddai: Ascension of the Metatron, including director Takeyasu Sawaki, is The Lost Child, the latest issue of Dengeki PlayStation reveals. It is a turn-based RPG with command-style battles.
The Lost Child is based on the world that is the mythical concept of El Shaddai. Lucifel (voiced by Ryota Takeuchi), who appeared in El Shaddai, will also appear in The Lost Child. The game is set amidst a conflict of demons in modern day Japan.
PS
Editor's Note: This is all the information we have right now, but check back around 5:00 a.m. ET. The game is likely also featured in Weekly Famitsu, which will post its magazine coverage previews online at that time.
Update:
It's for PS4 and Vita. Published by Kadokawa.
Teaser trailer: https://www.youtube.com/watch?v=NcoDBxALC6U
https://www.famitsu.com/news/201705/23133568.html