Can't really say for the US but here it was bundled with the Dark Knight Returns skin and Tim Drake, and was the bonus for pre-ordering through JB Hi-Fi (which I'm assuming is Australia only). The pre order bonus I got to going to EB (which I think is just a rebranded Gamestop here) was 1970's Batman, the red hood film, a metal case and the Joker's Carnival battle map.
If the costumes are sold in a pack I'll probably just buy that then, but if not then B:TAS Batman is the only one that has my interest (unless I'm misremembering whether Batman Beyond/Terry McGinnis Batman was realistic or also done in a similar animated style).