3x17 Sneak Peek: Wally, Cisco and J’onn take on Music Meister (with bonus Iris, Caitlin & Mon-El)
I may be proven wrong in the crossover, but I think the Musicmeister wouldn't be able to take the Green Arrow. A big deal was made about Barry and Kara losing their powers and that being the reason they have to play along, but everything that makes Oliver dangerous is knowledge. I mean unless he can take away his skills and his physique, dude's gonna get suckerpunched mid-song and threatened with a broken bottle until he lets Oliver go. I'd watch the hell out of that deleted scene.