Soccer World Cup 2014 & Olympics 2016 - links provided have info in English:
Soccer World Cup
Olympics 2016 link from the Braz. Government: http://www.rio2016.com
For general TIPS for travelleres, check the Braziliam Tourism official website: http://www.embratur.gov.br
VISA to enter Brasil: please note that Canadians planning to visit Brazil can request their VISA at anytime up to 5 years before their entry. This is because for Canadians the VISA is valid 5 years from the date is issued, eventhough it maybe allowed a limited stay, which is usually 6 month from the time the date of entry in Brasil. For all those planning to go to Brasil either for the Soccer World Cup or Olympics, it is recommended they apply for the VISA as soon as possible, so that they can avoid the high demand that is expected for when the time gets closer to the date of these events, which may impact on the processing time.
This content is displayed under "Services" topic of the top menu at the BrazilianAssociation.org website, as well as under the "News" topic.
Also, the links in this article are included among other of interest under "Links" in the "Services" menu option.