See blizz its not that hard to reskin things! Wain just did most of the work for you already
The "Striped", "Black" and "Zebu" all look nice and i would Gladly kill thousands of Half naked Stockade inmates over and over again to get exalted for a mount like that. Worgen would be the first faction i would want to get exalted with on all my toons.
Then i come to the "black Stag" skin. All i can say is WOW! Its new, its cool and to be honest i think it fits the worgens and the zone perfectly. Looks somewhat cursed, tough, brave and strong enough to run around with a wolf-man on its back. (not to mention it can fit both the "cursed land/pepole" lore and the "human+ mounts=horses" argument all while giving everyone a new look) I just spent over 200 runs getting my raven lord and i have to say i would be tempted to ride that guy instead of Anzu if i had the choice. xD *sigh* if only if only.