"The Little Mermaid' shines, thanks to Halle Bailey and a warm wave of nostalgia

As the movie that began Disney's animation renaissance in 1989, a live-action "The Little Mermaid" comes with big fins to fill. Thanks largely to star Halle Bailey, the lavish musical holds up nicely under the weight of those expectations, preserving the original's essence while updating undernourished aspects of it and riding a warm, hard-to-resist wave of nostalgia.