They would revert to reading Scripture as a moral guide, which happens in a lot of churches. How many people have you heard say that the Bible is a guide for living?
Living according to the Bible will cause many to clean up their acts, but as you know one sin is enough to condemn us.
Satan is not worried about Scripture, but of a proper understanding of Christ. As long as churches preach morals, Satan is happy, because he knows we can’t keep the law.
One more point: Satan is a master manipulator of Scripture. He can take Christ out of it sooo easily. We have to be careful to remember that Christ teaches that all of Scripture is about Him.