Spike and Rarity's very very awkward child.
Anyway, on the subject of the thread. I have done extensive searching into this.
The seller of this has gotten many of the toys early, from blind bags to the latest in the Rainbow Power set.
He lists it as an official toy. So he is putting his seller reputation on the line by doing that.
The toy itself is a NEW mold. It isn't found anywhere else. In fact, the only previous Hasbro toys that were this big, were the light up and talking Princess toys.
This is 22cm tall. To put that in perspective, if you have the SDCC Derpy, that was 16 cm. This is 6 cm taller then that, which is simply huge.
The biggest for a 'brushable' toy. The head design and horn design hasn't been changed at all. There is a Celestia and Luna mold that uses the same kind of horn.
But the wings are totally new design.
It has a lot of work put into it to just be a knock off, so for right now, I believe him. It will be something that Hasbro will be selling.
Now will it appear in the show? Possible. Discord means that almost anything can happen. Permanent? Up in the air, we shall see. If Hasbro were just going to make a toy like Rarity's Butterfly wings, they wouldn't have done it on this scale.