One year after the Canterlot invasion Soundwave, Starscream, and the Minicons are proven to be reformed and are left alone by the Autobots with Vinyl Scratch. But when an opportunity arises that's just too good for Starscream to pass up, the very fabric of time and space is threatened. Soundwave, Vinyl Scratch, and the Minicons must now save all the universe with some unlikely, but familiar allies

Credits:
on DA for letting me use the cover picture.
DJMoonRay for Soundwave Prime's pony form (and other ponyformers)
Alchemo Arrow on FiMFiction for Soundwave Prime's cutie mark