Promising
Do not have much to say as this is a preview but it does look promising. The only other thing you could do to make this more scary is possibly a heavily distorted and slowed down version of the Cupcakes song playing in the back as Pinkie Pie kills her best friend. The clip from the show at the end kind of gives you the idea she will be killing Twilight after a few minutes. Nice preview, looking forward to the completed thing.