The Retro Headmasters weren't on the list of expected upcoming toys for Australia last year, but a surprise today... we are supposed to be getting them. Both waves if there aren't any problems in the next few months.

The first wave of four (Chromedome, Hardhead, Brainstorm, Mindwipe) should be in Target by early March.
The second wave of three (Highbrow, Skullcruncher, Weirdwolf) should be in Target in the second half of the year.

So it's a bit like the Buzzworthy Bumblebee toys... if you are willing to wait, the toys will be here 2-3 months after America and Asia. And if you aren't willing to wait, or fear missing out (or just don't have a Target handy... or expect Target prices to be shocking), import them when they get released overseas.