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
It's you, all of you! I knew it. I told them there was a secret floor, but would they believe me?
Version of Legion of Super Heroes
Welcome To The Jungle
Performed by Guns N' Roses See more