In 1889 the WBT$ predicts in detail the spiritistic scheming priestcraft it would come to embrace (due to the harlotrous GB's insatiable lust for graven unnatural spiritual intercourse or prostitution with demons):
"The underlying principle of the Great Reformation, to which all Protestants look back with pride, was the right of individual judgment in the interpretation of the Scriptures, in opposition to the papal dogma of submission to clerical authority and interpretation. On this very point was the whole issue of the great movement. It was a grand and blessed strike for liberty of conscience, for an open Bible, and the right to believe and obey its teachings regardless of the usurped authority and vain traditions of the self-exalted clergy of Rome. Had not this principle been firmly held by the early Reformers, they never could have effected a reformation, and the wheels of progress would have continued to stick in the mire of papal traditions and perverted interpretation."
See paragraphs 4-11 at http://www.biblestudents.net/htdb/o003.htm
From the 1889 Watch Tower "The Old Theology" Tract No. 3 "Protestants, Awake! The Spirit of the Great Reformation Dying. How Priestcraft Now Operates".
See dx86-10 list of "Watch Tower Publications" when searching Watch Tower library for "Priestcraft".