The Ides Of March

Immediate Family: Heavy Times, Shut Up Little Man!, Spider-Man 2 Teaser
Distant Relatives: Capturado
Family Gossip: The first three movies on the left are all being released in 2011.

Take Me Home Tonight

Immediate Family: Studio 54, Hairspray
Distant Relatives: See this post.
Family Gossip: Unlike Studio 54, each cast member of TMHT gets a close-up shot.

Thor

Immediate Family: Tron, Cowboys & Aliens, Jonah Hex, Predators
Distant Relatives: Harry Potter, Iron Man, The Unforgiven (Korea, 2005)

Killers

Immediate Family: Risky Business, Lolita
Distant Relatives: They Live, Natrual Born Killers

Date Night

Immediate Family: Blind Date
Family Gossip: Note how the Bruce Willis' appearance makes the Date Night stars look rather tidy by comparison.

How To Train Your Dragon

Immediate Family: E.T.
Distant Relative: Sistine Chapel Creation of Man painting
Family Gossip: Note how Dragon references the fingers and the moon from E.T.

Babies

Immediate Family: Babel, Havoc, Bee Season
Family Gossip: Fellow poster fan Matt alerted me to this one, and pointed out the Babel/Havoc similarity. Thanks Matt!