The first teaser trailer for Apollo 18 has just been released. Based on the idea that the cancelled Apollo 18 mission took place and was covered up, Apollo 18 is a found footage film that shows the crew's encounter with alien life. The film will be released on April 22nd, 2011 and is directed by Gonzalo Lopez-Gallego and produced by Timur Bekmambetov (Night Watch, Day Watch, Wanted).
The video is currently an Apple exclusive, so click on the source link below to watch the video. Keep in mind that the trailer does appear to show a good bit of the plot, so if you don't want spoilers, you may want to just see the first half.