There it is, the trailer of The day the earth stood still. 
A remake of the 1951 classic sci-fi film about an alien visitor and his giant robot counterpart who visit Earth.The remake of The Day the Earth Stood Still will supposedly remain true to the original movie. However, there is a chance the remake will more likely remain true to the short story upon which the 1951 movie is based. In either case, the alien weaponry seems to have been upgraded. In addition to a city going dark, and a very brief look at the new Gort, the film trailer shows a cloud of black smoke, capable of rapid movement and disintegrating matter on contact.