China has a billion people. If so many of them weren't impoverished, the box office would probably be three times the size of the American box office. Action movies with lots of spectacular effects work better in China and other foreign markets, because they're not dialogue heavy. And for the most part, there aren't cultural idiosyncracies that get in the way--given it's all fantasy and not anchored in specific cultural practices. AQUAMAN should do well, because it's a total fantasy for anyone, regardless of country.