More than two decades after Michael Jordan starred in Space Jam, the Looney Tunes are on the court again. In Space Jam: A New Legacy, it’s LeBron James who winds up in an animated world where he has to save his son (and the Looney Tunes) from Don Cheadle’s rogue AI—by winning at basketball, of course. There’s more plot to this film, though you wouldn’t know it from the trailer. Fictional LeBron’s son, Dom (Cedric Joe), has computer skills that catch the attention of Al-G Rhythm (Cheadle), who somehow sucks Dom and his dad into the Warner Bros. “Server-verse,” where King Jame...