In an interview at CinemaCon Elisabeth Banks claimed that Catching Fire was an upgrade from the first movie.

“You really get to see the Capitol, you really get to see the Victory Tour, and we get to see all the districts. So just world building, in a bigger way… we really get to expand on it. You know, it’s not  just District 12 and the Games, but also all the districts, and the Capitol, and the Hunger Games.”

Source: Extra TV via. Mockingjay.net