The next chapter coming to Dead by Daylight will be licensed and will bring Pinhead into the game.
A further confirmation of this comes from the video teaser file name uploaded on youtube called: "DBD_Hellraiser_Teaser_FINAL_with_sound"
The chapter will have no survivors, but in order not to release a simple 'paragraph', Behaviour has been working on an original survivor that will be released later, in the v5.3.0 patch.
The new killer will have 2 outfits, one of which will be legendary and will cost 1485 auric cells (the other will cost 1080 auric cells) and they will be released on September 7th together with release of Chapter 21.
The new survivor will receive 11 skins of which 4 will be composed of only leg and torso pieces.
The PTB to try Pinhead with its new perks and its new power will be released on PC on August 17th.
*Note: I remind you that all this can change until the actual announcement by Behaviour.