Just so you know there is a spoiler in here. I accidentally saw it and it bothered me so I am going to try to push the spoiler off of the page since it is apparently a big one. Be careful of posting spoilers in the title of a post or in the first few sentences of the post because others might accidentally see it and have the season spoiled for them. It sucks.
Yes it's true now its officially confirmed that the third brother is really going to be there and the casting details of this character is out...You can read the full details here Casting Details of Supernatural another Brother