There are many great Australian films with complex, realistic Aboriginal characters and stories. Peter Weirās The Last Wave is possibly the best-known in the US (he also of course directed The Cars That Ate Paris, already mentioned here and relevant to the original topic).
Iām by no means an expert on Australian cinema but I have seen maybe 50 Australian movies, and Aboriginals are never seen in a disparaging light - they are often/usually treated poorly by the white characters, but this is always viewed with an intentional and critical eye by the filmmakers. Thereās nothing like the casual, institutional and absurd racism of Hollywood against Native Americans - although I am not familiar with many Australian films from before the 60ās or so.
More often than not, they are largely or completely absent from films (and my guess is that they are almost completely absent pre-60ās). Understandable because of their relatively small population, and because of who makes the movies, I suppose.
Thereās certainly a good argument to be made that Aboriginal characters should be included more, and not just in cases where their plight is a focus of the story. Genuinely positive representation in other words. But my point is that Australian cinema is far and above better than Hollywood in terms of depictions of the respective indigenous peoples.
Now, as for Mad Max, in the originals you didnāt really get much of an explicit backstory for most of the characters (besides Max) - it isnāt necessary, because they have such outsized screen presence from their imaginative costumes, vehicles, and personalities/actions.
To me this seems like a perfect setting for a positive-representation Aboriginal character - he or she would be a total badass (or Badass) and you would know immediately by looking at them. They could incorporate some of the interesting Aboriginal customs (like the white designs painted on the body - obviously I know nothing about whether that would be appropriate or not, but the filmmakers and the actor would) and survival skills for the outback and so on. Itād be an essential part of the character and would be very cool, but would not solely define them (in other words, theyād hopefully not be Tonto). Eh, in fact itād clearly be better if they didnāt incorporate those customs (i.e. just cast an Aboriginal actor as one of the main characters but change nothing), though the temptation would be very high in this setting.
Thereās no evidence as far as I know that such a character is in the new film, but there are clearly dozens of characters you donāt see close-up in the trailers. I suspect there wonāt be any Aboriginal characters, though. Itād be really hard to do what I described without it seeming like a token, which is worse than just having no Aboriginal characters, since lack of such characters is by and large the norm.