(In theaters, January 2008) There really isn’t much to see in this dry, dull and wholly unnecessary fourth entry in this faded series. The threadbare plot is just an excuse to crank up blood-lust until it’s all released in a long and self-mocking third act that is all about violent retribution. Thanks to cheap CGI and two decades of gore-hardened audiences, decapitations and amputations feature heavily in the cringe-inducing butchery; even jaded viewers will wince at this 300-level type of carnage. Not that there’s any attempt at a deeper level of insight from writer-director-star Sylvester Stallone: The emotional beats of the story are trite, the moral arguments are non-existent, the villains have no personality beyond simple evil and the addition to the Rambo mythology are laughable. And even that is spending far too much time dissecting a movie that deserves no interest or attention.