Guys, hope you are all happy about this news. This article at http://www.nytimes.com/2004/07/06/movies/06BROT.html?ex=1091815724&ei=1&en=38223fd992701242 proves the existence of Brother Bear 2:
[N]ext week Rutt, Tuke and pals begin recording “Brother Bear 2.”
Also, this page at http://www.laurelsprings.com/viewNewsItem.asp?NewsID=132 confirms that Brother Bear 2 is being recorded this Summer.