The correct answer to this open question is the following.
Unfortunately, you did not specify the name of the movie or some other reference.
So trying to help you we are going to write a general thematic statement of any movie.
The movie I pick is Walt Disney's "Remember the Titans."
The general statement would be this.
"Teamwork, commitment, and perseverance can overcome any obstacle in life."
This is the correct statement because the movie shows the story of the Highschool football team in Virginia in 1973, during a time of racism that divided not only the American people but the students at school. The Highschool replaced a white head coach with an African American coach and the parents of the whites decided to boycott the season.
So the coach has a huge challenge to unite a diverse group divided by racial issues.