With all that being said, the ONLY superhero film that I doubt I would ever sit through again is Supergirl (1984) because I can't think of a single thing the film did right.
1. Casting Helen Slater as Supergirl. 2. Giving Supergirl a perfect comic-accurate costume. 3. Expanding the mythology of the Reeve Superman films - in 1984, a shared universe 24 years before Iron Man kick started the MCU. 4. A distinctive theme tune which reminds you of the Superman theme without copying it. 5. Peter O'Toole as Zoltar - Supergirl's Ben Kenobi, but as a drunk failure who needs a kick up the back side. 6. The Phantom Zone revealed as a wasteland of black rock and sludge, not Hell but purgatory. How many superhero films condemn their heroes to purgatory? 7. Probably the best pre-CGI flying sequences ever filmed. Supergirl dances in the air at times. 8. A dark fantasy tone (demons, magic, witches) which is unique among superhero movies.
Let me expand on #7, above. The scene where Kara arrives on Earth and discovers she can fly redeems the whole movie, for me. The playfulness, the sheer delight she shows, were perfect. And the bit where she flies over the lake, and just trails her hand in the water - how can you not love that?
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