Villains, metahumans, and time-traveling bad guys, watch your backs. Heroes are about to collide in an epic gathering of DC Comics’ CW superheroes, including Stephen Amell (Arrow), Grant Gustin (The Flash), Melissa Benoist (Supergirl), and Caity Lotz (Legends of Tomorrow), along with the mastermind behind all four series, producer Greg Berlanti. The fivesome will join forces at EW’s PopFest to talk superhero TV and answer fan questions in a special Q&A.