The trailer provides a summary of the final Harry Potter film in 3 key points:
1) It opens with the recognizable Harry Potter theme music slowed down to set a darker tone, before introducing the returning antagonist, Lord Voldemort.
2) Voiceovers from Harry and Voldemort establish their binary opposition and the climactic confrontation building throughout the film series.
3) Dramatic music, dark imagery, and intertitles like "epic" and "phenomenon" showcase the large scale action and conclusion of the beloved franchise through intense magical battles.