How to train your dragon 2 is actually pretty good. The thematic question is something like “How can a peacemaker stand against a powerful and ruthless enemy?” They do a great job playing this to the full. Also just a beautifully structured and moving film.
I also like The Stormlight Archives, especially Oathbringer, which examines the question of how a man who has done horrific things can overcome his past and do the right thing in the face of terrible odds.
Speaker for the Dead is another great one. It asks the question, “How should you deal with a culture you can’t understand at all but you find threatening?”