Monsters is going to be prone to comparisons to District 9. It has no well known names starring, a newer director/writer, and looks to be a lower budget movie. Instead of your typical aliens, this movie features life forms from outer space that are more reminiscent of sea monsters (at least the destructive, scary ones). It ran at SXSW earlier this year, and it seems to be finally gaining some strength and appeal after this trailer was released.
Monsters is in a limited release in the US on October 29, 2010.