Sérgio Sá Leitão, the director of RioFilme, posted the following on his twitter (translated to English by the Twilight Lexicon):

"An estimated investment of U.S. $ 2 million into the economy of Rio is part of bringing Breaking Dawn’s team to film here. I Can not say anything else. I count on your the understanding. I think Rio is putting itself in a solid position as a destination for international productions! All security measures will be taken to ensure a smooth shoot. The City Council and Gov. of the State will provide needed support.”

Speaking of Breaking Dawn, there's a new interview with Lee Pace where talks about playing Garrett in BD: