When news first broke in September that Arrow and The Flash executive producer Greg Berlanti is also co-creating a new Supergirl TV show, many fans hoped it would land at The CW, which would allow the series to crossover with his aforementioned shows. Just a few short weeks later, CBS picked up the project, seemingly dashing fans' dreams of Oliver Queen, Barry Allen and Kara Zor-El existing in the same DC Comics TV universe. However, in this week's issue of Entertainment Weekly, Greg Berlanti teases that it may be possible for Supergirl to crossover into these existing shows. Although there is no quote from the producer himself, take a look at the following excerpt from Entertainment Weekly.

"Later in the afternoon at his other office on the Warner Bros. lot, Berlanti meets with fellow producer Ali Adler and Oscar-winning costume designer Colleen Atwood to go over looks for their upcoming revamp of Supergirl. The show will follow 24-year-old Kara Zor-El, Superman's cousin, and with a twist that that could melt fanboy brains, Berlanti says it's possible this Supergirl could enter the worlds of Arrow and The Flash."
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The news comes just one week before The CW's big two-night crossover event for Arrow and The Flash, and ABC's Marvel's Agents of S.H.I.E.L.D. has recently been crossing over with the upcoming midseason show Marvel's Agent Carter. However, these crossovers exist within shows that air on the same network, and it remains to be seen if CBS is willing to lend its character out to a competing network. It should be noted that while Berlanti hints that it's possible for Supergirl to show up on Arrow and The Flash, it isn't known if the opposite is possible as well, i.e. Oliver Queen (Stephen Amell) and Barry Allen (Grant Gustin) popping up on Supergirl.

Even if the cross-network politics are worked out, what kind of story would be told that would involve Kara Zor-el, Oliver Queen and Barry Allen? We already know that Supergirl will create a new origin story, so it's possible that this plot could include connections to both Starling City and Central City. It's worth noting that DC's Geoff Johns stated last month that all of the DC movies and TV show form a multiverse, as they all exist on the same plane of existence. Would you like to see Supergirl meet up with Arrow and The Flash? Chime in with your thoughts below.