The journal ended up in the hands of the priest who performed the original exorcism, Father William S. Bowdern who was assisted by his friend and academic, Father Walter Halloran.
The room had been locked and forgotten about for decades due to the evil that had occurred there 30 years prior.
Currently, The Exorcist reboot is slated for 2021 but no official date has been given and details of the project have thus far been minimal.
The movie starred Linda Blair as Regan MacNeil and Ellen Burstyn as Regan’s mother, Chris.