If Hellraiser is for sure coming in '19, most likely it'll only be 1 and/or 2, given that they have the same story flow as Halloween 1 & 2. Sure as the franchise continues, we get introduced to more cenobites, and maybe (depending on the rights to the latter sequels) we could at least have scareactors dressed as those ones, while the environments and maze story focuses on the first 2 movies. Hell, maybe we can get that infamous scene from part 2, the one where Pinhead and the female cenobite were disguised as doctors, but unfortunately it never made the final cut because apparently those involved felt the bleeding mouth effects for their surgeon masks looked too fake. (Yet there are images of that scene in promotion for Hellbound).