One of the defining factors about the DC/CW verse of TV shows is that they can crossover with each other at any time. Flash first showed up on Arrow, then Arrow went to Flash once he got his series. The two series together made up Legends of Tomorrow, and then Supergirl kept finding ways to crossover. The special crossovers featuring all the shows are meant to be major events, except they don’t always stick the landing. This year though, DC/CW are going all out with “Crisis On Earth-X”, and if Stephen Amell is anything to go by, it’s going to movie style in many ways.
At a panel in Salt Lake City (revealed by ComicBook.com) Amell noted that unlike before, the crossover won’t be “hour blocks of content” like in previous crossovers:
“But you’re not supposed to be watching the Supergirl hour going ‘Okay, this is the Supergirl hour.’ It’s just the first hour of the crossover.”
“When we first did the crossover, I guess back in our third season and The Flash’s first season, it was very much like ‘It’s an episode of The Flash where I show up, and then an episode of Arrow where he shows up,’” the actor said. “And even last year, it was like ‘You know, Flash showed up on Supergirl, and then it was an episode of The Flash, an episode of Arrow, and an episode of Legends.’ But this year is just a four-hour movie.”
While he didn’t give spoilers, he did note that he was so thrilled with the script that he called up the Arrow team and thanked them for this epic opportunity. The “Crisis On Earth-X” begins November 27th.