StarDragon at MLP Arena found these figures on eBay. They come from a seller in China who is describing them as Hasbro products, and appear to be small and fully sculpted, suggesting they are similar to blind bag figures. They may also be bootlegs or knock-offs.
(Thanks to Itajn for these.)
I will not be adding these to the G4 Checklist until more information is uncovered, but it's pretty cool all the same. Even if they do wind up being fakies, they look pretty great and would be a nice addition to any collection.