The stadiums are already in place so as long as Brazil have used the preparation time this has saved to take a look as the issues the the World Cup brought, things should run smoothly. Little seems to have changed for the poorest members of Brazilian society so we can certainly expect some protests in the weeks leading up to the games, just as we did in the build-up to the soccer.
Yep, but those are football stadiums and the infra-structures for the Olympics are different. Either cases I do agree that a big part was done after the World Cup.
It is definitely going to be great for the Brazilian people and their economy. However, they are desperately trying to clean up the area more due to crime and poverty.