As Gok mentioned, for some reason this sort of Con hasn't really worked in Australia in the past. I am not sure if it's due to population as cons in other countries with comparable populace and lack of Hasbro support have worked really well and have become yearly events.

I think it has to do with how impossibly expensive it is to do anything of the sort in this country and a 'Geek culture' not being as pronounced in the population.