Swamp Thing didn't appear in "Crisis on Infinite Earths," but never say never about an Arrowverse appearance. Speaking to CBR, DC's Legends of Tomorrow executive producer Marc Guggenheim addressed the possibility of Swamp Thing appearing on the show now that The CW has acquired broadcast rights to the DC Universe original series.
"Oh, good question. I mean, look, I tried very, very hard to get Swamp Thing in 'Crisis on Infinite Earths.' Because when you've got Constantine, to not have a crossover with Swamp Thing, it's just a shame, a wasted opportunity," he said. "I honestly don't know the answer to that question, in large part because whether The CW has the broadcast rights to Swamp Thing or not, it doesn't really impact the various reasons why Swamp Thing wasn't in 'Crisis.' My attitude is always hope springs eternal."
"You know, if you had asked me before we'd done 90% of the things we've ended up doing on the Arrowverse shows, I would have told you it wasn't going to happen," he added. "So long ago, I got out of the prediction business, because stuff happens that, man, I would have bet real money that it wasn't gonna happen."
While Guggenheim doesn't rule out the possibility of a Swamp Thing appearance, he didn't exactly confirm one was in the works, either. At the time of writing, then, it seems Legends of Tomorrow doesn't actively have any plans to include the Protector of the Green. However, he did seem hopeful about the chance of it happening at some point in the show's future.
Last March, Guggenheim revealed he had originally included Swamp Thing in the "Crisis" crossover, but that "for a variety of different reasons, I couldn't make that happen... That was a really important inclusion for me. I did want Swamp Thing to be a big part of the crossover, because -- if you've got Constantine -- to not have Constantine and Swamp Thing together is a missed opportunity."
Swamp Thing was DC Universe's third original series, following Titans and Doom Patrol. The show was cancelled only one week after it premiered on the streaming service, reportedly due to budget concerns linked to its primary filming location in North Carolina. This news came after the premier season's episode count was suddenly reduced from 13 episodes down to 10 ahead of its release. The entire series, which will debut on The CW this fall, is available in its entirety on DC Universe.
Airing Tuesdays at 9 p.m. ET/PT on The CW, DC’s Legends of Tomorrow stars Caity Lotz, Dominic Purcell, Nick Zano, Maisie Richardson-Sellers, Tala Ashe, Matt Ryan and Jes Macallan.