Word of God is stuff the creators have said is true about their universe, even though it's not in the actual work. Word Of Dante is stuff the creators haven't said is true about their universe -- but everyone assumes it is true because an independent authority, scholar of the work, or Big Name Fan has said it -- often with supporting arguments. It's a kind of ascended Fanon. A more literary criticism friendly technical term for it would be deuterocanon. Frequently creates Adaptation Displacement. May also help create Misaimed Fandom if the Dante's ideas contradict true canon or Word of God.