Ancelotti is a living legend and for him to have accepted the offer as the new coach of the Brazilian team means that he's going to do his magic to bring back some of the great players which are not part of the team yest to ensure he builds the team with them. Ancelotti is a great coach he will definitely use his experience to achieve a good result to the Brazilian national team.
No one could doubt about the qualities of Carlo Ancelotti, even though this season was catastrophic for him as a manager for Real Madrid and the successive disappointments he got there.
Now he has a bigger job and more stress to let the Brazilian team shining again. For this ambition, he has to not hesitate to get ride from useless players regardless of the names and bring fresh ones ready to help the national team.
I heard that he wants Casimero in the team and we will see how much change will happen later.