Were you feeling, perhaps, that the "Earth = Third World, Space-Station = America" border-control/immigration/class-uprising allegory in "Elysium" didn't look quite on the nose enough? Well, here are two trailers for Bong Joon-ho's (of "The Host" and "Mother") upcoming "Snowpiercer," in which an ice age has so blighted the planet that the remainders of human society now exist entirely on a gigantic train that travels constantly on a globe-circling track - the richer you are, the closer you live to the engine and get to run the show, while the progressively-poorer live further and further back into the tail. Chris Evans is guy who leads a rebel-uprising among the poor to storm the engines.
The Weinsteins have U.S. distribution on this one, so you'll probably see it sometime between tomorrow and never.