I didn‘t see footage or screenshots where they literally stole the likeness of a character. It would be bad if they did that but I‘ve seen no evidence of it. As far as I know mixing generic tribe aesthetic with generic sci-fi aesthetic can‘t be protected either. I don‘t want to repeat my previous comment but I don‘t see the issue here. It would open a barrel of worms for the entire industry if vague aesthetics are suddenly protected. The lawsuits would never stop and small dev teams would make concessions left and right to fence off armies of lawyers.