It's arguably one of the most pressing questions of the entire Arrow-verse: how the hell will Supergirl officially join the continuity of The CW's other DC series? We're beyond excited for the Kryptonians to make their way to The CW from CBS, but the series will need to explain why nobody in Star City or Central City has ever mentioned the numerous aliens from National City until now. As it turns out, there may be an easy solution for dealing with this narrative issue, and (if recent rumors are true) it all has to do with Grant Gustin's Barry Allen a.k.a The Flash.
Supergirl, The Flash, Legends of Tomorrow, and Arrow all recently began production, and as such numerous tidbits of information have begun to pour in from the set. According to Bleeding Cool, one major rumor seems to indicate that the upcoming Flashpoint arc on The Flash will act as the means by which Supergirl's alternate dimension becomes merged with the standard Arrow-verse. Barry Allen's reckless insistence on messing with the timeline will have some major effects on Earth-1 universe, and when he has finally returned home it sounds like National City and Kara Danvers (Melissa Benoist) will suddenly become an accepted and established part of his own reality.
Of all the things Barry Allen has used time travel for over the last two years (it's a long list) this has got to represent one of his more rash decisions. The Season 2 finale of The Flash saw the Scarlet Speedster go back in time to save his mother from Eobard Thawne a.k.a Reverse-Flash, and as a result his entire reality has changed to reflect Nora Allen's survival. Known as the iconic Flashpoint storyline, this narrative will have a ripple effect throughout the Arrow-verse, and serve as a sort of minor continuity reboot for many of the series. While it's still not confirmed at this point, having Flashpoint act as the bridge between Supergirl and the rest of the Arrow-verse makes plenty of sense from a storytelling perspective.
If these rumors turn out to be true, then don't expect any substantial introductions between Kara and the rest of The CW's DC characters. Once Supergirl has officially entered the proper Arrow-verse continuity, all of the shows will likely treat Kara and National City as if they have always existed within this reality -- because they technically have. Only Barry will notice a difference. Time travel, remember?
We will keep you posted regarding any and all updates related to the upcoming premieres of The CW's Arrow-verse series. The Flash will debut on Tuesday, October 4 at 8 p.m. EST, and Supergirl will premiere on Monday, October 10 at 8 p.m. EST. Make sure to check out our fall TV premiere schedule and mark your calendars accordingly.