Plagued by delays and opposition at home, the World Cup in Brazil might be a turning point for sporting mega-events, forcing soccer's governing body and the International Olympic Committee to accept less ambitious bids to reduce the risk of public backlash.

Described by Brazil's government as "the cup to end all cups," the tournament kicked off Thursday to a backdrop of controversy and concern.

The world soccer organization, FIFA, is facing corruption allegations over how Qatar won the right to host the 2022 World Cup as well as match-fixing claims, fewer countries are keen to host big events and even some sponsors are starting to question the "halo effect" of associating with them.