Their motivations remain unknown, but the timing has some speculating what it could mean. The official Lucas Film channel on YouTube posted this teaser trailer for Episode IV on the eve of New York Comic Con. The why behind this is unknown. It was introduced via the Lucas Film twitter account prompting readers to “Check out the trailer that started it all!”
1976, the world was introduced to #StarWars... Check out the trailer that started it all! http://t.co/tOsMjDZ2XF
— Star Wars (@starwars) October 9, 2013