What background-events should be in the "Hobbit-movie?"

In my opinion The Hobbit would be very easy to make into a fantastic live-action movie. One of the most interesting background pieces of information that no one has mentioned is how the swords Orcrist, Glamdring, and Bilbo's Sting ended up in the Trollshaws. The movie could also show what life was like mining coal in Ered Luin. These would just be interesting pieces of information that Tolkien fans would enjoy seeing in a movie based on The Hobbit.