Brazil and Argentina will very easily qualify for the world cup. because the contestants in the CONMEBOL zone are only 10 participants. and 5 of them will qualify. and a fairly balanced opponent for Argentina and Brazil is only Uruguay. in terms of squad material Uruguay can be competitive with Argentina and Brazil, the other quality is too far compared to Argentina or Brazil.
Brazil qualifying is currently not very certain because they have lost much more than they have won the advantage of the number of teams that are to qualify from the CONMEBOL is their advantage, if they were to consider outside this then their chances will be very small, going through history of the world cup Brazil have qualifed for almost all the world cup and the arrival of a new coach which will be faces with this first task of qualifying for the world cup will be a reason their will be improvements in the team and their chances will again be more because he wouldn't want to fail at his first task.
Brazil, Argentina and Uruguay are the teams with a fairly good squad with good dept amongst their rivals amongst all the CONMEBOL teams .