That is what we discovered on Wikipedia concerning the Supanova Comedian Con & Gaming:

Supanova Comic Con & Gaming (also known simply as Supanova) is a fan convention focusing on science fiction and fantasy film and TV, comic books, anime, gaming and collectables. It is held annually in the Australian cities of Sydney, Brisbane, Melbourne, Perth, Adelaide and the Gold Coast.

The first Supanova was held at the Sydney Showground on the weekend of 20–21 April 2002. It was the successor to comicfest!, four similar conventions under the same management held between March 2000 and November 2002 in Sydney. On the weekend of 13–14 September 2003, Supanova held its first convention in the city of Brisbane at the RNA Showgrounds. In 2008, Supanova expanded to include Melbourne (back-to-back with Brisbane) and Perth (back-to-back with Sydney). In 2012, the convention expanded again, arriving on the Gold Coast and Adelaide for the first time. As of 2013, the combined annual attendance across Supanova's six events was estimated at 160,000 (From 11,600 to 39,400 in 2013 across all cities) with the largest attendance of 50,800 fans participating at the Sydney expo, June 2014.