Pet Sematary: Bloodlines is the follow-up to the 2019 supernatural horror Pet Sematary which drew inspiration from Stephen King's acclaimed 1983 novel of the same name. With a Fantastic Fest premiere and a streaming release on Paramount+, Pet Sematary: Bloodlines becomes the fourth take on King's novel as it was also preceded by 1989's Pet Sematary (featuring King as screenwriter) and its 1992 sequel Pet Sematary Two. Breathing new life in the source material, the 2019 movie was met with polarizing critics' reviews but still proved to be a box-office success. Taking on a new storyline altogether, Bloodlines attempts to tap into the novel's mythology further.
https://screenrant.com/pet-sematary-bloodlines-timeline-setting-explained/