I really loved how the world opens up in the second book. The mythology opens up, the story's much more complex, you see more of the Districts and Capitol, and you really start to get a sense of the meaning of things. This one's very different. The arena's much more active. and the movie's about different things, thematically: it's about the beginning of a rebellion, and Kat is becoming a symbol, and there's much more love story. She's been in the Games, and so we had a lot of discussions about what that means, how one can be haunted by taking part in violent acts and witnessing violent things."  

 - Francis Lawrence on Catching Fire in Total Film Magazine