You all know Goobbues, right? Those big, greenish, funny looking guys who love to yawn, eat and sneeze?
I want a Goobbue mount that can fly in the expansion, by flapping its arms like a hummingbird.
I hate the cash shop, but THAT's something I'd pay real money for.
EDIT: In order to promote the glory of Goobbues, I shall add this beautiful, stylized picture of a Gentleman Goobbue to the OP.
You can make out the monocle, wide smile and a red nose, most likely from indulging in only the best of wines. His eyebrows tell of a flirtatious mood, and if you look closely, you might even make out his top hat. Make the Goobbue proud by showing him how badly you desire for his kin to take to the skies with us!