You know that when the marketing focuses on the diversity of the cast rather than the merits of the movie itself that you are in for a stinker.
Ocean's 8 - received meh reviews
Ghostbusters - bad reviews
Why? Not because there is anything wrong with female leads in movies, but if that is the only thing your movie has going for it, you know it will be pretty weak.
Bonus point - movies that aim for the diversity marketing card don't make a lot of money anyway. Look at Star Wars: The Last Jedi. Made far less money than The Force Awakens. Solo was then a box office flop, and neither Ocean's 8 or Ghostbusters made a lot of money either. So despite SJWs clamouring for more "representation" in movies, they aren't willing to pay to go watch them.