"The Expendables" is mainly an exercise in nostalgia and action movie wish fulfillment. And violence. A lot of violence. If you are of the right age, or are a connoisseur of the Steven Seagal flavor of direct-to-DVD action film, seeing all these guys up on screen actually is a lot of fun. It doesn't make it a good movie by any stretch of the imagination, but it's still a lot of fun.