The Australian state of Queensland may be preparing to bid for the 2028 Olympic Games, a decade after the Gold Coast is suppose to host the Commonwealth Games.

Delivering a presentation on the preparations for the 2018 Games at the Major Events International Summit, head of security Danny Baade revealed there had been “discourse” around the possibility of an unorthodox attempt to host the Olympics.

“All mega events are going to change in some way in the future to make them more affordable and to make them based on legacy so there’s a lasting impact after they’ve gone because they cost so much money,” he told delegates.

“So the model Queensland may come up with will be a very different model and will be based across Queensland, and might even go into New South Wales. It’s a very real concept...that will probably be more transparent in 18 months time.”

Baade gave a snapshot of the progress the bid committee had made with venues and security for the Gold Coast Commonwealth Games. Around half of the new permanent facilities, such as the Carrara Stadium - where the opening and closing ceremony will take place - the Gold Coast Aquatic Centre and the Queensland State Velodrome, have already been built.

The stadiums yet to be completed will all be built with at least 12 months to spare before the 4 April 2018 opening ceremony.

According to statistics presented to attendees, the Games will create AU$2bn (£1.2bn, US$1.5bn) of economic impact. Baade explained that the event will be used as a catalyst to boost event and sport tourism in the region.