Some new plush backpacks have been spotted on the Brazilian toy website RiHappy. The design of the backpacks gives us a strong indication that they're manufactured by Accessory Innovations. The website however, mentions Multilaser/Multikids, but that could be a Brazilian importer. The only pony from the mane 6 that misses in this series is Applejack (but that's diffidently not the first time!). The plush backpacks really look a lot like the 16 inch Accessory Innovations plushies, with glossy manes with glitter and comparable eye designs.
They're currently listed as out of stock and no price information is available, but we hope to see these listed on US-based website soon for some accurate pricing and availability information.
Other images can be found below:

Summer Break has started for most people. (Enjoy your holiday's!) It's also the time several stores are selling school supplies for when school starts again. Toys'R'Us is also selling a lot of new Pony items.

Thanks a lot to Steven for the images!