Insomuch of the current leader of Brazil's old age and nearing death, and as a result of his two sons death (both aged 2), Pedro II's daughter and heiress apparent, Princess Isabel, is prepared for her upcoming reign as ruler.
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Also, in seeing Paraguay's political instability and their inability to properly elect, or sustain a proper leader without some sort of corruption, and the instabilities of the Liberal, Coloradan, and the heinous 'Nueva Germania' groups. With the Battle of Cerro Cora occurring, and a lot of the Paraguayan population being wiped out and the navy destroyed, Paraguay is seen as unfit to be an independent nation, and Brazil requests full colonization of the nation.