SPOILER WARNING: This article contains spoilers for tonight’s episode of “DC’s Legends of Tomorrow,” the finale of the “Invasion!” crossover, which has not yet aired on the west coast as of publication.
While this week’s “Invasion!” crossover between The CW’s four DC Comics-based superhero shows was relatively business as usual for “The Flash,” “Arrow” and “DC’s Legends of Tomorrow” — those shows are all set in the same fictional world and regularly share characters back and forth — it was something new for “Supergirl,” as that series (which aired on CBS in its first season) takes place on an entirely different Earth.
Though it wasn’t the first time Supergirl (Melissa Benoist) has interacted with Arrowverse characters — that was earlier this year in the “Worlds Finest” episode of “Supergirl” season one, which guest-starred Grant Gustin as The Flash — in each instance, the shows had to jump through some expository and interdimensional hoops to make a meeting happen. That process looks to be considerably simpler going forward, as tonight’s episode of “Legends of Tomorrow” — the finale of the “Invasion!” crossover — saw “The Flash” regular Cisco (Carlos Valdes) equip Kara with a device to make cross-world travel and communication a snap, without having to wait for the S.T.A.R. Labs crew to contact her.
According to Andrew Kreisberg, an executive producer on all four of The CW’s superhero shows, that plot development was exactly what it seemed like — a deliberate effort to streamline future crossovers between the shows.
“We’ve gotten to the point where we wanted to make that a little bit easier,” Kresiberg told press including CBR during a Q&A this week at The CW’s Burbank headquarters. “The next time we do it, it doesn’t necessarily have to be because Oliver and Barry need Kara; it could be because Kara needs them.”
Of course, while another crossover between the DC-based shows is effectively inevitable, that doesn’t mean the creative folks involved have a plan for them yet, having just wrapped the most ambitious one yet.
“We just barely survived this one, so we’re not too concerned with what we’re going to try to do next year, but it just gives us, as storytellers, another way to come at a story,” Kreisberg added.
Thus far, the crossover has been a ratings success for all shows involved, with The CW reporting season-high numbers in the overnights for “Supergirl,” “The Flash” and “Arrow;” making it likely that tonight’s “Legends of Tomorrow” will continue the streak.
“DC’s Legends of Tomorrow” airs 8 p.m. Thursdays on The CW; “Supergirl” airs 8 p.m. Mondays on The CW.
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