According to article, it says “World Cup organizers will mark 100 days to go on Tuesday with work still to be done on stadiums and infrastructure in the 12 host cities.” Countries that host World Cup could have better circumstance for players and soccer fans by building many stadiums. Since World Cup is decent opportunity to attract a number of tourists, countries that host World Cup could have many benefits. Players who showed outstanding performance in World Cup matches could have chances to play in another leagues. World Cup could be great chance for fans to know more about players from other countries and fans could be more interested in star players and many foreign leagues by World Cup.
http://www.nbcsports.com/soccer/brazil-has-100-days-get-stadiums-ready-world-cup