Barry and Oliver introduce Supergirl to the new fight club, Felicity and Cisco applying additional features to the fight in which The Flash, Green Arrow, Supergirl, White Canary, Firestorm and Atom need to fight to stay alive.
Did You Know?
This features every superhero from the CW shows. See more
You think that's bad? Try running with these on your feet.
Welcome To The Jungle
Performed by Guns N' Roses See more