Star Wars. But Harry Potter does share some interesting similarities. And to be brutally honest I wish Lucas had followed Rowling’s example and trusted the audience to grow with the series. I’m amazed at the depth, nuance, and darkness in the Deathly Hallows - especially when compared to the wide-eyed innocence of Philosopher’s Stone. JK clearly trusted her audience to mature and take it all on board as things got progressively heavier. I wish George had taken the same route with ROTJ.
Well, RotJ is visually and graphically darker than Empire. If not for the slapstick and if better executed the whole concept of Luke getting closer and closer to turning to the dark side, it could’ve been a pretty dark movie.