This is the sixth film in The Conjuring Universe after The Conjuring, Annabelle, The Conjuring 2, Annabelle: Creation, and The Nun.
The Curse of La Llorona was produced by James Wan, who directed the first two Conjuring films before passing the reins to Michael Chaves for the upcoming third movie.
It precedes Annabelle 3, aka Annabelle Comes Home, which just announced its title and June 28, 2019 release date.
The Conjuring 3 is reportedly scheduled for September 11, 2020.