Constantine To Guest Star On Arrow

Matt Ryan will reprise his role as John Constantine in the upcoming season of Arrow, The CW announced today at the Television Critics Association.

"It's a great one-shot episode," mentioned Mark Pedowitz during the CW's presentation, although obviously a number of DC Comics characters have come for one episode and ended up returning for more in Arrow's history.

Constantine, which ran for 13 episodes on NBC last season, became a cult favorite with a huge social media presence and a significant "Save our show" effort when it was announced that NBC wasn't ordering a back nine, or later a second season.

The CW was considered a "last hope" for Constantine to get a second-season pickup before the cast and crew's contracts lapsed earlier this summer. In the time since, fans have continued to press Arrow producers on the possibility of a crossover, and producers continue to say, essentially, that they hope they can make it happen but have no promises for anyone.

Executive producer Marc Guggenheim had previously said that Constantine was considered as a potential "expert" they could have called upon during Season Three to give Oliver Queen the lowdown on the Lazarus Pit and other seemingly-mystical elements of Ra's al Ghul's mythology. While that never happened, magic and mysticism are themes that will be explored to a greater extent in Season Four.

Arrow returns with new episodes starting October 7 at 8 p.m. ET/PT Wednesdays on The CW.