I watched this news on 7 & 9 last week. They both mentioned that a site was being considered around Badgerys Creek (I'm surprised nobody here has mentioned it). With the government confirming Badgerys Creek as the new Western Sydney airport site, I'd imagine anything being built around it would have height restrictions on coasters, tower rides, hotels & fireworks etc.. This article: http://www.dailytelegraph.com.au/newslocal/south-west/scouting-for-land-and-big-plans-for-sydneys-wonderland-theme-park-return/story-fngr8hxh-1227538637601 also confirms his intention to have dark rides.