Maybe the rump Brazil would manage to reannex the independent Bahia but don't know if it would be possible to regaing farflung areas like the Grao Para and Rio Grande do Sul...my guess is that nowadays this alternate Brazil would be divided in the following countries:
Brazil - OTLs Sao Paulo, Rio de Janeiro, Parana, Espirito Santo, Minas Gerais, Goias and parts of Mato Grosso do Sul and Santa Catarina...Bahia and Sergipe a probability also.
The Ecuatorian Confederation (or other name) - Alagoas, Pernambuco, Paraiba, Rio Grande do Norte, Ceara, Piaui.
Grao Para - Maranhao, Para, Amazonas, Roraima, Rondonia, Amapa.
Republica Riograndense - Rio Grande do Sul and part of Santa Catarina (other probability is that they would unite with Uruguay).
Wild card: Mato Grosso - culturally linked with the alternate Brazil but too far and without direct connections with Rio de Janeiro....maybe would be a flashpoint between Brazil and Grao Para.
Acre would remain in Bolivia....