I have never been able to figure out what the 'good news' is that jw's preach.
An infamous Watchtower quote:
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w81 5/1 p. 17 If God Has an Organization, What Is It? ***Let the honest-hearted person compare the kind of preaching of the gospel of the Kingdom done by the religious systems of Christendom during all the centuries with that done by Jehovah’s Witnesses since the end of World War I in 1918. They are not one and the same kind. That of Jehovah’s Witnesses is really "gospel," or "good news," as of God’s heavenly kingdom that was established by the enthronement of his Son Jesus Christ at the end of the Gentile Times in 1914.