I have no problem with this. I've read all of Mark's books. He is an excellent author. Unless I'm wrong Tom Clancy wanted this and his family approved it.
I highly doubt it.
Fox has already ordered up a Pilot show for it. If the Pilot does well, it could become a series.
The Exorcist TV Series: Fox Orders Pilot for Modern Horror ...
variety.com/2016/tv/.../the-exorcist-tv-series-pilot-fox-12016866