It's kind of a big deal. Dragon Con is an Atlanta institution, and, since its beginning in 1987, has grown to be the largest multimedia, pop culture convention celebrating scifi-fantasy, gaming, comics, literature, art music and film in the country. This year, more than 65,000 people are expected to attend the four-day event over the Labor Day weekend that sprawls over downtown Atlanta, with events held at AmericasMart Building No.