I kinda doubt it this time. If the Mane 6 are in a band, they need some kind of rival, right? And Sunset Shimmer wasn't in the teaser clip I watched. So, she'd need some bandmates, right?
It is a "punk rocker" who turns into a wearwolf. Sunset brings twi back as she does not trust the punk rocker, turns out punk rocker is a wizard from equestia. I give trixie a 30 second cameo at best.