This is something we didn't expect to see so soon but oh my goodness are we loving it! This is the first sneak peek at November 28th's crossover event with all four shows. The scene is introducting the whole group of heroes to Supergirl and it plays out exactly how we dreamed it would! Supergirl is clearly the big heavy hitter and the strongest of all the heroes and their reaction is increadible! Watch it for yourself below!