"Everything’s going to be just fine!"
...and thus, Evil Twilight. And she'll take your bending away.
Seriously, this is my foretelling into season 4, and it might be a three-parter from the last ep, as explained by Meghan McCarthy. But I never wanted her to be entirely evil, just a corrupt being possessing her and transforming her slowly into what Night Mare Moon used to be. Except as you can see, her right wing is only effected, which means that the transformation isn't quite complete yet... incomplete freak.
EDIT: I renamed the title. For various reasons.