at least according to the guys over at IFC ...
http://www.ifc.com/news/2009/06/50-g...t-trailers.php
They should be called leaders.
We know them as trailers, but they don't trail anything; they play before the movie, not after it. The name dates to their earliest incarnation, when they actually did follow the feature. The documentary "Coming Attractions" dates the very first trailer to a 1912 Edison serial entitled "What Happened to Mary?" After each installment, a black card with white text would appear to inform audiences "The next incident in the series of 'What Happened to Mary' will be shown a week from now." Not exactly "In a world..." but it did the trick back in 1912.
We know them as trailers, but they don't trail anything; they play before the movie, not after it. The name dates to their earliest incarnation, when they actually did follow the feature. The documentary "Coming Attractions" dates the very first trailer to a 1912 Edison serial entitled "What Happened to Mary?" After each installment, a black card with white text would appear to inform audiences "The next incident in the series of 'What Happened to Mary' will be shown a week from now." Not exactly "In a world..." but it did the trick back in 1912.