We don't know much about the upcoming CBS Supergirl TV series from Arrow and Flash's Greg Berlanti other than we think that it's an awesome idea and we fully support it.
A few questions arise, naturally. Tonally, will Supergirl match Arrow and The Flash, despite being on a different (though corporately connected) network? Also, with Berlanti behind it, could Supergirl share an actual DC TV-verse with the CW shows in a way that FOX's Gotham (which is also restrained by being a prequel) and NBC's Constantine can't? And the logline mentions Kara Zor-El's "famous cousin," so it seems clear that Superman exists within the world of this show - but how much of a force/factor will he be if he's never shown on-screen?