Looks like a run of the mill T.V. intro,
This review is from: I Am Number Four  [Blu-ray] [US Import] (Blu-ray)
The intro or trailer tells the whole story. Good aliens fight bad aliens on Earth. The aliens good or bad get intertwined with earthlings. Evidently they did not hear Carl Sagan's warning that making love with an alien is like making love with a petunia.
There is a little valence and car chasing but no profanity, nudity, or blood. There is no number two.
I wonder if the same people will be in the TV series should this take place. I guess this presentation was tied to the book series do they could not really wrap it up in the end.
The DVD extras include deleted scenes. Becoming number six. After years Blu-ray and 60" TV's there is no need to tout the visuals and audio.
Actual quote "I think the chance of a man mating with a petunia is much greater than the chance of him being able to mate, much less produce offspring, with an inhabitant of another planet."