A few days ago, and again today, Hasbro released a press release about what they had planned for Comic Con. This was part of it! The full pony trolley is apparently ready to go, and Mallinda over on Deviant Art caught a picture of it. In my opinion, all trolleys need to include ponies.
They also took a video! Check it out after the break!
inb4 mane cast member in season 2.
Thanks to Shane for the heads up!