The first official trailer for "Gangster Squad," the 1940s cops-versus-gangsters flick from "Zombieland" director Ruben Fleischer, has arrived online... and I'm a bit whelmed. Feels like "L.A. Confidential Part 2," now with more Ryan Gosling and less Guy Pearce — which isn't the worst thing in the world, minus the "less Guy Pearce" part.