From WannaBeFree's quote from the 85 WT:
During this thousand-year judgment period, Jehovah evidently will give additional instructions, unknown to us at present, as new "scrolls" are opened. (Revelation 20:12) How marvelous it will be for the survivors of the "great tribulation" and for the resurrected dead to gain instruction and guidance from these further instructions as set forth on these unrolled "scrolls" of Jehovah and to carry them out delightfully!
Notice the oft used argument pattern:
"Jehovah evidently will give additional instructions, unknown to us at present, as new "scrolls" are opened"
"evidently (pure speculation) will give" and new "scrolls" (The quotes are only around "scrolls", but everyone reads "new scrolls")
Then, following "(Revelation 20:12)", everything is stated as if the idea has already been proved. And, of course, layered on top of this is the ever present atmosphere not to question "the slave class."
Here is the snippet from Revelation Climax:
But during the resurrection, countless millions of studies, based on the Bible and the new scrolls, will no doubt be conducted!
And here is the snippet from the "Knowledge of God" book:
New "scrolls" will then come into use. Evidently these are God's written instructions that will serve as a basis for educating earth's inhabitants.