You can't have a world in which the USA is both on the winning side of World War 2 and anti-communist for Brazil to be communist. OK, you got Cuba, but you need the USSR to get nukes into Brazil just in the nick of time combined with an unusually inept American response for something like that so I suspect Cuba was a one-off. Now you can change either or both the USA being anti-communist and winning World War 2 but that changes tons of other things.
Now maybe before World War 2 there is a chance, if you change a bunch of the personalities involved.
This board tends to exaggerate the chances of Communists taking over countries. If you look at the actual Communist take-overs, they fall into a pattern of 1) Russia (1917), 2) China (1949), 3) anti-colonialist movements where the anti-colonialist movements were backed by the USSR and China or 4) countries conquered by the Red Army. The problem is that Brazil doesn't fall into any of these categories. Cuba, not incidentally, did, it was to all intents and purposes an American colony before Castro. The Portuguese African colonies also did. But I don't see how you get a Communist Brazil when your sole instance of a Latin American communist country is Cuba, under really special circumstances.