Couples Retreat Trailer: Vaughn and Favreau Vacation In a Familiar Place

The trailer has just been released for Couples Retreat, a comedy about skilled improvisational actors and the perfectly taut bikini bodies who love them. With a cast that includes Jon Favreau, Vince Vaughn, and Jason Bateman, one might expect a comedy built on wild, manic riffing and off-kilter observations. So why is the trailer cut together as though the film's merely an island-set version of the typical schlub/hot wife sitcom?