“Part 2” looks much like most contemporary dystopian future worlds, one that’s by turns similar enough to ours to be reassuring and different enough to be diverting. What makes the material still feel personal — other than the yearslong investment and love that transform entertainments into fan communities — is the combination of Katniss and Ms. Lawrence, who have become a perfect fit. Ms. Lawrence now inhabits the role as effortlessly as breathing, partly because, like all great stars, she seems to be playing a version of her “real” self. It’s the kind of realness that can give you and the movie a jolt, as in a scene with Ms. Lawrence and a sensationally raw Jena Malone that thrusts it into that place where heroes and villains give way to something like life.