Supergirl (1984)

 

After losing a powerful orb, Kara Zor-El, Superman's cousin, comes to Earth to retrieve it and instead finds herself up against a wicked witch. 

Of course, it's a silly comic strip adaptation, but made with lots of wit and irony, exciting sequences, and Dunaway has a field day as the bad bad witch.

Halliwell*: "Playful comic strip spectacular which entertains in Wizard of Oz style for most of its way but was savaged by the critics."

Maltin*1/2: "This comic-book movie is a super-drag: long, dull, heavy-handed. Slater is cute but bland in title role; Dunaway is a predictably campy villainess."