The Lightening Thief

Immediate Family: Peter Pan, Harry Potter and the Half-Blood Prince
Distant Relative: The Day After Tomorrow

Daybreakers

Immediate Family: 30 Days of Night
Family Gossip: I'm a big fan of the 30DON poster, so when I saw Daybreakers, I was disappointed to see that someone had ripped it off. But then I looked into it: both posters come from the same design house. I'm not sure if that makes it better or worse.