All the series you mention race in our winter. A summer series would fill a small gap there, but also i talking about New Zealand which can make up the areas which you mention and the lack of prominent open wheelers catagory in australia.The problem there is that Australia's home-grown race series - the V8s, of course, but also the Utes and the Nations' Cup GT cars - are well developed and well supported. There simply isn't the room in Australia's motorsport community for a full-time Indycar-rules series. South America hasn't that issue, as most South American series are fairly small time and big-league open wheel racing was common there until the late 1970s, plus the vast number of Brazilian, Argentinian, Chilean and Venezuelan drivers in modern open wheel racing, both in North America and Europe.
Or even a Asia-Pacific series with japan and verious other nations invoved
i see.The Thunderdome is too small and too steeply banked for the Indycars. 24 degrees of banking on a mile oval is pretty hairy for Indycars, particularly with the D-shaped track layout. Getting the Thunderdome to work well for Indycars would require widening the track and either knocking down the banking from its current 24 degrees or rebuilding it as a tri-oval, and you'd probably have to expand the pits, too. Running clockwise in an oval-spec Indycar is not gonna happen, because modern Indycars bot OTL and ITTL are designed with offset suspensions and staggered tires for left-hand turns, and they wouldn't change the cars that much for one event. The race would probably run counter-clockwise. The Thunderdome is fairly rough in terms of facilities, too, and if Indycars wanted to run a race in Melbourne the racetrack at Phillip Island is in considerably better shape. Calder Park would need a major renovation before it would have any hope, and I don't see that as likely considering the track's current shape.