Exorcist is being release at the start of the Halloween season and will be playing in every other format not in IMAX (digital, 4DX, Dolby, regular). IMAX films only get played 4 to 5 times a day vs 20 to 50 times a day for new releases with all formats combined.
This new Exorcist is the start of a new trilogy, which massive studio Universal will be pushing hard to make it a success.
Plus exorcist is a bigger and more recognized icon can Taylor worldwide so if the film ends up with good critic scores for a horror film and word of mouth, it will easily take the top spot given it's advantage of having way more showtimes.