'The Flash': The film's most surprising cameo, explained
Warning: Spoilers for "The Flash" will follow. It's a bird! It's a Cage! "The Flash" is packed to the brim with surprise DC cameos, as Helen Slater's Supergirl, Christopher Reeve's and George Reeves' Superman, and Adam West's and George Clooney's Batman all show up. The standout appearance,…
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