IGN caught up with Stephen Amell and Arrow producer Wendy Mericle at Comic-Con this past weekend and asked if there are any plans in place for Matt Ryan's John Constantine to make an appearance on The CW series during season four. "Yeah, we really want to do it," confirmed Mericle. "It's something we've been talking to DC about and it's just a question of some political things, but also the actor's schedule. We're trying to work it out, but we don't know 100 percent if it's going to happen." That's a very positive update, and Amell added: "Fingers crossed," before Mercile finished by stating that "[We're] really optimistic and we would love to have him."