Looks like the collector's companion will be a Lucky Quilen Cub. For those curious what a WoW Quilen is, it's a lion-esque creature, as seen here. So I guess just imagine a smaller, cuter version of that mob as a minipet?
There's still no image or model preview for the new pet, but if it really is a baby Quilen, it'll be the first CE pet in a while that's NOT a whelp. *gasp* Good thing? Bad thing? It all depends on your personal preference.
For me, since I most likely won't be getting the CE version (unless I want to invest in ALL the CE pets that I possibly can), it will just be interesting to see what this new pet looks like. I also find it intriguing that a CE mount (Imperial Quilen) was also datamined. I'm not big on collecting mounts, but I think this will be the first CE mount.
MMO-Champion also has an interesting image that's named "turnippet" - first preview of the Terrible Turnip?! There's an orange version of it as well but the coloring makes it look more like a carrot than turnip lol.
For some reason I'm extremely amused and hypnotized by this possible turnip companion. Could it be it's large, glossy red eyes? It's oddly shaped, er,
UPDATE: Wowhead has a 3D model preview of the turnip in all its glory. Judging from the datamined animations, it looks like the Terrible Turnip will likely be similar to other plant-like pets and submerge when idle and then pop up out of the ground to move around. The death animation is especially amusing. XD