It's definately Brazil this year.
I took the course last year and wanted to take it again, so I emailed Prof Mercier and asked if it would be a different region. He said he is too busy this summer to make a new course, so it will be Brazil again.
That's just for term 2 though. Prof Rink is teaching term 1, and I don't know what his region will be.
I've never heard of him, so I looked him up on ratemyprofessor.com. I know you shouldn't trust that site too much, but I've never seen such bad reviews before :/ So if you're planning on taking it term 1, be wary of the prof. :/