Story is canceled. I liked the idea, but I don't think it's going to work. If you want to see a good example of how NOT to write a musical story, read on!
A recent mission that ended in utter disaster threatens to tear Twilight and her friends apart, and it's happening at the worst possible time: A deranged reality-warping unicorn called "Bilious Brass" is launching an effort to revive Discord. If Equestria's greatest champions—and Trixie, whose bad luck has landed her right in the middle of the conflict—cannot overcome their doubts, the city of Canterlot will surely fall to Brass's insanity.

But even if they stand together, how can they hope to defeat Bilious when his full plan is known only to two cowardly con artists?

This story is set shortly before the events of Keep Calm and Flutter On. Thanks a massive lot to Silverguard for the spiffing cover!