LONG LIVE THE BAT DC COMMEMORATES 80 YEARS OF BATMAN WITH WORLDWIDE FAN CELEBRATION   DC Releases Landmark DETECTIVE COMICS #1000 Issue; Iconic Bat-Signal to Light Up Across the Globe; Partnership with Boys & Girls Clubs Of America; Exclusive Fan Festivities; and More   Yearlong Celebration Kicks Off at SXSW with 1.5 Million Bats Flying…