The film's climax features a monumental, heavily stylized duel between He-Man and Skeletor within the confines of Castle Grayskull. A major, tragic twist occurs during this confrontation when King Randor (Adam's father) is killed, raising the emotional stakes and forcing Adam to fully realize the burden of leadership. Skeletor is ultimately defeated, but the film leaves his absolute destruction ambiguous.
The post-credits scenes radically expand the universe. A mid-credits scene features Queen Marlena and Duncan discussing Marlena's other lost child, Adora. The camera then cuts to another planet where a blonde warrior is approached and called Force Captain Adora, to which she replies she is no longer that person, revealing her as She-Ra and holding the Sword of Protection. Finally, the ultimate post-credits scene shows Evil-Lyn surviving the battle, picking up Skeletor's discarded skull, and walking away with it into the shadows as his iconic laugh echoes—setting her up as the true mastermind or the vessel for his resurrection in a potential sequel.