Not a reboot, but rather Exorcist 4, 5, and 6 (well, 5, 6, and 7 depending on if one counts the prequel).

A new trilogy continuing the story of "The Exorcist" will have original star Ellen Burstyn reprising her role of Chris MacNeil, a mom whose daughter Regan, played by Linda Blair, begins exhibiting strange behavior.
Burstyn, who was nominated for an Oscar for the role, will start alongside "Hamilton" actor Leslie Odom Jr. as a father tracking MacNeil down when his daughter is possessed.
The first film in the series is set to be released in October 2023. The next two may be scheduled for streaming.

The film is not a remake of the original, instead the new films will be a continuation of the 1973 horror classic.

Source

Well that's unexpected. Got a funny feeling the events of Exorcist 2 won't be mentioned in any fashion, though.