The city's Federation Square saw 1245 people break the world record for the most number of people dressed in superhero costume, in one place at one time.
The CBD was no place for bad guys with Superman, Batman, Robin, Wonder Woman, the Green Lantern and other comic book heroes portrayed hundreds of times over by people of all ages, genders, shapes and sizes.
The managing director of Warner Bros. Consumer Products in Australia, Preston Lewis, shouted triumphantly in his American accent: "We did it, we broke the record my brother.
"To see all those people, young and old, families, babies in Fed Square was great, they were so enthusiastic," he told AAP.
"Whenever you were born, people have a connection with those characters and grew up with them."
The world-record attempt was part of the 75th anniversary celebrations for DC Comics, which began publishing in 1935.
The new world record beats the old one by less than a week, after 1091 superheroes turned up at a rugby tournament at Twickenham Stadium in London last weekend.