The last time they hosted the world cup was back in 1994 when Brazil's national team won the world cup and they had many famous players like Romario and there we had a great experience in 1994. Once again America hosting it and I hope to see the same.
If I remember correctly, the Latin American teams were very lucky in the World Championships on their continent and mostly unlucky outside of their time zone (Argentina won the World Cup for the first time in a "foreign" land). If this pattern continues, then Brazil will indeed have increased chances for the title, although in fact there, starting from the quarter-finals, the percentage of players playing in Europe will be close to 100.
Yes but although I have never been to South America, I feel like the fans can contribute a lot to their teams' successes. I know that this didn't work out very well in 2014 against Germany, but still the crowds are amazing there. But I still think that even in three years from now France is probably still the dominating force in world soccer. It is unbelievable how many young outstanding talents are spread all over European soccer. England and Spain also have quite a few, but France is all set for several years to go.