Brazil? Now I am not trying to be pessimistic but if people thought that the 2010 Commonwealth Games in Dehli lacked somewhat in the infrastructure and readiness of the facilities; at least the majority of the visitors to those games returned home with their valuables and their lives.
Short of a very nasty 'ethnic cleansing' style sweeping away of the favelas and their inhabitants, I see a security and safety disaster looming in Rio in 2016; it is a lawless place.
As for property; there may be good investment opportunities in this potentially beautiful tropical paradise but remember that the Real used to be at around 4 to the Pound and today it is 2.7 so the exchange rate is against you; plus you would need to buy somewhere well away from the big cities and in a gated and guarded development.