‘The Defining Chapter’ declare the posters for this wrap-up episode in Peter Jackson’s trilogy of ‘The Lord of the Rings’ prequels, the last of three films stretched from JRR Tolkien's one novel, 'The Hobbit'. Exactly what’s being defined is left conveniently vague, because what we have here is a whole lot more of Jackson’s proven formula: more battles, more creatures, more not-quite-comical asides, more stern speechifying and more gob-smackingly elaborate action set pieces.