What is the fine-grained topic of the following text: Even if the movie is exceedingly mediocre, which I found it be, I’m glad it’s printing money and I’m glad that it’s the second supposedly surprise hit this year to feature a predominantly non-white cast (after Black Panther, now the biggest superhero movie in history and the third-biggest movie overall, ever). Only return the topic.
Success of films with predominantly non-white casts.