We first heard of Lost Soul Aside two years ago when it was revealed to be the work of one person, Yang Bing, and was a mightily impressive action game in the vein of Devil May Cry. Sony, Epic, and others immediately waved their cheque books and the game became a timed PlayStation 4 exclusive.
The last we heard the game was scheduled for release this year but the trailer does state the game is still a work in progress. Sony have not mentioned a release date so it’s probably going to be a 2019 game now.
Source: YouTube