How events like world cup and Olympic games can help to change the Brazil's reality?

The realization of mega events range from the revenues and costs of the tournament to a specific number of other factors, such as new forms of funding, accelerating the development and urban renewal, involing centers conventions, cultural facilities, theme parks, among other combinations in cities and countries organizers.
Therefore the legacy arising out of these also events is firmly associated with non-sports results, and are important sources legitimacy to the receipt of their own games with social and cultural impact  within the communities.