Just for reference here is the winning Brazil squad from the Confederations Cup last year:
Goalkeepers: Júlio César, Jefferson, Diego Cavalieri
Defenders: Daniel Alves, Thiago Silva (c), David Luiz, Marcelo, Dante, Filipe Luís, Réver
Midfielders: Fernando, Lucas Moura, Hernanes, Oscar, Jean, Luiz Gustavo, Paulinho, Bernard, Jádson
Forwards: Fred, Neymar, Hulk, Jô
Just saying that whilst on paper they don't have the best squad when it comes to the tournament with home advantage they have as good a chance as anyone.