Eliezer posted to Facebook:

In My Little Pony: Friendship is Signaling, Twilight Sparkle and her companions defeat Nightmare Moon by using the Elements of Cynicism to prove to her that she doesn't really care about darkness.

My stab at it. I'm probably going to post it to FIMFiction in a day or so, but it's basically a first draft at this point and could doubtless use editing / criticism.