The Battle of the Bands was awesome alright, but painful to the losers who got blasted away by a strange force. There were also tears if you were Twilight Sparkle of the Rainbooms. The Sirens magic had turned her (boy)friend Flash Sentry into a cold and spiteful person with only thoughts of winning the competiotion. The Rainbooms entered in order to preform a counter spell to stop the Sirens magic from making the students adore them. Now the two are facing each other on stage to see who will go up against the Dazzlings. But Twilight doesn't want to go against Flash and now faces a conflicting choice.

(This is a little idea that I got while re-watching Rainbow Rocks on YouTube)
(Note this is teen because one of the songs has a curse word and it might happen between Rainbow and Flash)
(Also an OC tag because the official names for Flash's band members as well as that one teen with the atom tag on his shirt has not been given yet)