You both decided that since it was a theater, they were going to show a movie that would be based on a superhero that you have seen in different comic books that would reveal something you haven't seen before. New designs of the supervillain, and old, and maybe new designs for the superheroes, and damsels.
While at the theater, you both felt out of place when you noticed that some of the patrons were wearing superhero costumes to watch the movie, and didn't have time to head home, and change. You, and your girlfriend instead go to a concession stand to get your drinks, popcorn, and chili-cheese dogs before going to see what superhero movie you were going to see. You both sat down next to each other in the front row of the screen room, and saw a couple of previews before seeing the movie itself.