I leave you with a summary of the new mounts available in Mists of Pandaria. Do not forget that by clicking on the images you can see it in 3D.
Mist Serpents
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The following mounts require exaltation with Order of the Cloud Serpent, which will take about a month to achieve that reputation.
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Reins of the Thundering August Cloud Serpent you need to be Exalted with the The August Celestials and costs 3,000g.
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Reins of the Thundering Jade Cloud Serpent Can be obtained from Guild Vendors after finishing Tier 14 content.
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Reins of the Astral Cloud Serpent it will probably be of the celestial style like Algalon / Elegon.
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The following mounts have not yet been rated:
Dragon turtles
The Dragon Turtles are the racial mount of the pandaren - both horde and alliance factions will have access to them.
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Cranes
There are three types of cranes that are available and can be purchased by being exalted with Golden lotus for the modest price 3,000.
The next three cranes are obtained by information and are three other colors.
Yak
Reins of the Grand Expedition Yak is the new version of 
Reins of the Traveler's Tundra Mammoth.Costs 120,000g and can be purchased from Uncle Bigpocket at Kun-Lai Summit. The mount comes with two built-in NPCs: Cousin Slowhands which repairs equipment and sells you food, and Mystic birdhat, a reformer. Also sells 
Reins of the Blonde Riding Yak y
We have also been able to obtain information from a few other Yaks.
Water Strider
This mount requires to be exalted with the Anglers and costs 5,000g. What is special about this mount is that it can walk on water.
Special mounts
Imperial Quilen This mount will be awarded free to those who purchase the MoP collector's edition.
Heart of the nightwing This mount will be the one that will replace the Recruit a Friend rocket, and will be obtainable from July 17.
Miscellany
The following models are the flying mounts that the Flight Masters will use to help us move between the MoP flight points. It is not yet known if they will go on sale.
We have also come across some uncategorized mounts.
Reins of the Amber Scorpion this scorpion will be a reward for achieving reputation. exalted with the Klaxxi.
Jeweler Panthers
Jeweled Onyx Panther This mount is the combination of the following mounts: 
Engineering Rockets
Each engineering specialization will be able to create a flying rocket, similar to 
De-Weaponized Mechanical Companionin Cataclysm. Currently in beta, they are allowed to ride the rockets, probably in order to be tested.
Phoenix pandaren
Recently in a Blizzard thread, it was stated that the Phoenix Pandaren will be a mount that will be earned when the Challenge Mode achievements are completed.
Discs
Disk of the Red Flying Cloud It will be a mount that you can obtain by being exalted with the The lorewalkers.
