Fran Kranz, Chris Hemsworth, and Anna Hutchison in The Cabin in the WoodsTHE CABIN IN THE WOODS

Hollywood's been leading toward it for decades, and with the blithely enjoyable, exceedingly clever The Cabin in the Woods, it's finally happened: A movie has been released in which practically everything about it - its plot, its twists, its performers, its characters, its themes, its jokes - could be considered a spoiler.