Let me just share a link to the official presentation by Brazil in Copenhagen pitching for the games. (Click on the Rio Presentation slide.) It is a bit long for some, but very inspiring - and in English, and it is clear about how the politicians plan to pull this whole thing off. (Believe it or not.)
The two main themes, it seemed to me, are "Rio is Ready" given the recent economic strength and growth -- and "The Olympics will inspire the youth of Rio, Brazil, and all of South America, creating a significant leap forward in development for everyone."