A mad, laugh-out-loud mashup of “The Little Mermaid,” “Harry Potter,” assorted vampire tales, “Pan’s Labyrinth,” the disaster epic “2012” and oh – “Pokemon” – just to impose the cinematic precedents on display here, Sorcerer is a Chinese twist on the reliable sword and sorcery genre which caused Hollywood to impose “Clash of the Titans” and “Immortals” on the undeserving.