This week, Oliver Queen reunited with an old friend in the form of John Constantine in an episode of Arrow entitled "Haunted." Arrow showrunner Mark Guggenheim has now opened up about the difficulties of making the crossover, which relied on bringing in Matt Ryan, who played Constantine in the short-lived NBC show, happen.
"I’ll tell you, to be honest with you, it was tricky because [Matt Ryan was acting in a] play," Guggenheim told Deadline. "The play created a variety of scheduling challenges and believe it or not it was starting to look as if we wouldn’t be able to get him or we would only be able to get him for a day. It definitely posed a challenge."
Fortunately, the production team rearranged the shooting schedule and made it work, though Guggenheim says fans shouldn't hold their breath for Constantine's return.
"There’s no plans. This was always designed to be a one off."
Guggenheim also dished on the upcoming crossover between Arrow and The Flash, saying "There’s a lot of things that are really cool about this year’s crossover, one of which is the fact that there really is a true 2-part story unlike last year where it was two interconnected episodes where each had their own beginning, middle, and end."
"This is a big two-part event, one single bad guy, and it will very clearly launch Legends Of Tomorrow," he continued. "But at the same time what I think is a lot of fun about it is that it doesn’t feel like a backdoor pilot for Legends Of Tomorrow. It feels like an episode of Flash and then an episode of Arrow. It truly is a 2-hour Flash/Arrow event that just so happens to introduce us to some new characters who will be a big part of Legends Of Tomorrow."
Speaking of new characters to CW's DC TV Universe, Guggenheim does have a dream character he'd like to use.
Also on Twitter, a new promo for next week's episode of The Flash has appeared. Check it out right here:
And, speaking of that Flash/Arrow crossover, CW is holding a contest for two lucky fans to attend a VIP premiere screening of the crossover. You can enter here.
The Flash airs Tuesday nights on CW, followed by Arrow on Wednesday nights. Legends of Tomorrow will premiere in 2016.