If you go onto the AA website, the IFE screen menu is simulated on there so you can see what films and other options are available for the current and following month. You will need to look at the menu for the Boeing 777 flights.I saw The King's Speech last weekend so they're pretty up to date.

You will get a 'beverage' on the domestic flight and you might also get internet access for a fee of around $12 depending on the aircraft so if you have a laptop or smartphone, have them handy. If you have the aircraft with that access there isn't likely to be any other form of IFE.