In early December, Netflix dropped its highly anticipated musical comedy “The Prom,” starring Meryl Streep, Nicole Kidman, Andrew Rannells and James Corden as fading Broadway stars who set out to help a lesbian teen take her girlfriend to the prom.The film, helmed by out director Ryan Murphy, got mixed reviews, but some lambasted it as “ homophobic” and “ offensive” because of the casting of Corden, a straight actor, in what they saw as an “ aggressively flamboyant” caricature of a gay man.