EDIT: Warcraft Mounts is now updated!
As of patch day, we only know of three obtainable mounts, two of which overlap:
The Armored Blue Dragonhawk and Armored Red Dragonhawk are the Alliance and Horde equivalents for obtaining the achievement Mount Parade/Mount Parade, for having 200 mounts on any single toon. Being sombre colours, they may not stand out quite as much as the original Blue Dragonhawk, but both are quite pretty and detailed:
The Brawler's Burly Mushan Beast is the second mushan mount available to players, and may be purchased once you reach Rank 10 with the Brawler's Guild.
Coming soon, there's the Hearthsteed, which is believed to come from taking part in the beta testing of Blizzard's new Hearthstone card game. However final details have not been released yet. Also not revealed is the colour of the mount, hence no image yet. There are blue and red versions in the database.
This patch we're also anticipating the release of the colour-changing Enchanted Fey Dragon and the savage Armored Bloodwing mounts. There's been a lot of speculation as to what their sources might be, but nothing has been revealed yet. When I was shopping at the Blizzard Store recently, a bug string popped up at one point that contained the text "armoredbloodwing", so they're presumably considering making it a Store mount.
