According to this WorldofWar piece, Blizzard staffer have been hinting that Wrath of the Lich King - the upcoming World of Warcraft expansion - will include polar bear mounts.
We love polar bears. On the downside (we think), Amani war bears are being taken out of the add-on. We're not going to lie to you: we have no idea if this is good or bad. We just like polar bears.
Wrath of the Lich King launches in the back half of this year.