While Marvel has the upper-hand as far as the silver screen is concerned, DC is way ahead as far as the television series go - and, with Supergirl on the horizon, the company's future sure looks bright.
But we aren’t talking just about a single series, but about a different kind of shared universe - a shared universe which has already seen Flash and Arrow being joined together during the birth of Flash, with another joining following in the next episodes.
Supergirl - will this new series be set in the Flash/Arrow universe?
Of course, television crossovers aren’t unusual - but at the same time they aren't as usual as some might believe. However, if Arrow and Flash are owned by Warner Bros, the announced Supergirl series will be produced and will air on CBS. So it is easy to understand that sharing a universe between these three will encounter some problems.
Nonetheless, producer Greg Berlanti didn't debunk this possibility - and this alone says a lot. While we now know for sure that Gotham will certainly not have storylines intertwined with Flash or Arrow, we aren’t so certain about Supergirl.
Is a crossover beneficial for Supergirl?
Of course it is - this would raise awareness for the CBS produced television series, since Arrow is already a veteran, while The Flash proved its worth since it first debuted. Furthermore, if we are to believe that the Flash/Arrow crossover (which will be aired between the 2nd and 3rd of December) will break records, we can only imagine what will happen if Superman's cousin was also involved.
What other problems could arise?
Since she is, basically, as powerful as Superman, it will be very hard for Supergirl to find villains (or groups of villains) worthy of her strength. Furthermore, if it will indeed be a shared universe, the viewers could find it hard to believe that Supergirl doesn't have the time to help Flash or Arrow when they are in need (basically, it will be the same problem we have seen in the Marvel Cinematic Universe, during the solo movies).