After someone commented that the GIJoe toyline would probably be axed in Australia now that the movie was over and stores were discounting their stock to get rid of it, I asked Hasbro AUS, and below is the reply, confirming that the GIJoe toyline will continue here, but probably not as extensive as in America:

Currently we have some overstocks so it is unlikely we will be getting the further-out waves of product i.e waves 3 or 4 onwards in most cases.

We will most likely be continuing with a tight core line next year (ie figures and vehicles) to bridge the gap until the second movie.
For those who know the toyline better than me, hope that gives some reassurance of being able to buy more of your figures domestically.
If you want to know about specific future figure assortments, post the question here (detailing the size class and wave/figure-assortment), and I'll see if I can get an answer for you. No guarantees though.