The Brazil preliminaries have in fact been going on around the country since July of last year and 12 finalists have been selected until now. The 13th and 14th pairs will be selected during the next 2 upcoming weekends you can see the finalists on the JTB website here:
http://henshin.uol.com.br/wcs/
Its in Portuguese but try poking around, especially the regional finalists already selected along the top.

Things are getting so hot in Brazil that they have put together a World Cosplay Summit song!!!! You can listen to it here:

The lyrics are Japanese and the selection of expressions and production are excellent. It sounds almost like a song before or after and anime! Well, its hard to make that comparison but they did a great job anyway.

The final in Brazil will be on June 20th so we're looking forward to a good show there.