M.A., G.M., JH, J&K, NL, SS, AKR, DP, ND, NC, NB, CM

Update:

Over on the wonderful world of Twitter, Meghan McCarthy tossed this tweet out hinting at all of the writers working on season 5. All of them are in abbreviated form, so we get to do some detective work! More of that to come as we dig through them.List of Potential Names Below (So far)M.A. -(MAGIC DUEL, And a ton of other episodes, you know him!)G.M. -New to season 5, writes the books AKR -(Loads of episodes as well, Pinkie Pride, Testing 1, 2, 3, and many more)CM -(Sisterhooves Social, Hurricane Fluttershy, and loads more!)DP -(Rarity Takes Manehattan, Twilight Time, for Whom the Sweetie Bell Toils, and More!)JH -(New with season 4, wrote Castle Mane-ia and Leap of Faith)NL -(Pinkie Apple Pie, It Ain't Easy Being Breezies)SS -(Somepony to Watch Over Me and Trade Ya!)NB -(Maud Pie)NC -(New with season 5, writing for a Pie Family episode apparently, worked on Johnny Test and Fish Hooks) )J&K -(Also new with season 5, Mighty B, Fanboy, and Chum Chum writers)ND - ???