From the announcement:
New from Mantic in July, the Goblin Fleabag Riders are now available for advance order!
Goblins ride all manner of beasts into battle, from giant rodents to ferocious wolves, and even giant insects! The most popular mount for a Goblin who wants to strike fear into his opponents is the Mawbeast, but it takes a particularly unhinged attitude to want to tame and ride one! Thankfully, a Goblin’s desire to be a bit scary for once often outweighs his natural cowardliness.