Supergirl, The Flash, Green Arrow, and The Legends Figure in Four-Way 'Fight Club 2.0' Trailer; Annual Crossover Event's Villain Revealed by The CW

Following last year’s tradition, The CW unveiled a new “Fight Club” inspired trailer featuring Green Arrow, The Flash, White Canary, Firestorm, ATOM, and a new participant in the form of newcomer Supergirl.