Supergirl

A figure in a red and blue suit with a cape crouches over a large, dark weapon on a smoky, debris-strewn battlefield, then stands and swings it at a massive, armored opponent amidst fire and explosions. The scene cuts to a close-up of a woman in a similar suit with a red and blue costume and a prominent 'S' shield, then returns to the battle where the first figure, now revealed as a young man, fights the armored foe in a desolate, war-torn landscape.