The information you're reading is false. According to the webpage linked bellow, the first premiere of Balto II, on Cartoon Network, was on February 16th, 2002. This was three days before its official release on VHS and DVD. And if Steet's information is correct, it still, depending on the date, would have been in production in 2001. Late production anyway.
As for Balto III, it wasn't released until 2004. I don't know where you're getting your information from, but whoever is making these claims are wrong. I have yet to come across anything that backs up these claims.
http://www.toonzone.net/forums/threads/ ... t.2905431//balto/en ... id_film=11I can't lock forum topics, only mods can.