In the not-too-distant future, North Korea has invaded American soil. Our only hope is a gaggle of high school kids who form a guerilla army calling itself the Wolverines, after the local football mascot. Chris Hemsworth takes on the old Patrick Swayze role, and there’s enough to like about him and the general reworkings of the 1984 cult-classic. There’s plenty of righteous kills, explosions, patriotic speeches and righteous kills. It’s not a disaster. Just drab.