The devs behind DBD have just released the roadmap for their succesful asymetrical mutiplayer horror game.

Dead by Daylight | Year 4 - Dev Diary

From their dev diary as well a recent tweet, we learnt that in Year 4 players will get 4 new Chapters, 2 new maps, a map rework, as well as some new archives and new rifts. A new killer is already confirmed, Ghostface and Freddy will see a rework in the near future.