Two new Vicious mounts will be available for PvPers in Patch 9.2, Eternity's End: the Vicious Wolf and Vicious Toad! Both mounts have Alliance and Horde models.
Vicious Wolf Vicious Toad Patch 9.2 PTR Build 41089 DataminingDatamined Mage Tower Return No Playable PTR Till After Thanksgiving Mounts & Models. Read more on wowhead.com