How cool is it to have people like John Barrowman, Wentworth Miller and Katie Cassidy, who you can move around the board, but at the same time, how challenging is it to figure out when they can go where?
GUGGENHEIM: It’s a little challenging because we have to work around their personal schedules, and obviously there needs to be good communication among all the shows, so we’re not double booking them. No one has ever done a four-show universe. That’s totally unprecedented. The ability to move cast around that way is also unprecedented. The thing that we all really enjoy about it is that that’s the way it works in the comic books. The comic books are one large shared universe, and characters move back and forth between the different books. It’s fun to do the same thing with different shows.