Brazil will not able to go far, they're lack of midfielders and defenders.
If you compare with the other top 10 national teams by FIFA, they're have a complete squad, from goalkeeper, defenders, midfielders and strikers are equal. Brazil on the other hand have too much strikers and lack in other positions.
Having Ancelotti might able to change Brazil, but for the next generation.
Brazil lacks midfielders and Defenders? Are you kidding me, my friend, or do we watch football from different planets? I am no fan of Brazil, but they have more than enough talent to dominate once again if they are really organized.
Ancelotti is a tournament kind of coach, and most of his success has come from tournaments. I believe he will elevate Brazil and probably take them back to the old days.