I've never been much of a Supergirl fan. I've always thought she's a weak, but sweet and well-meaning, character that has no value. I don't see CBS's upcoming series as lasting for more than a single series. (Full disclosure here: I know the character of Kara was in "Smallville," but I didn't watch that series. I tried, but I couldn't get into the whole "DC characters as high school students and then young adults concept.)
That being said, I always thought that a better way to introduce Supergirl would be to make her a part of a Superman movie. Then, you can gauge the audience's take on whether or not she's important enough to continue on her own.
In my perfect Superman movie scenario, there would have been a sequel to Brandon Routh's Superman movie, but with amp'ed up action. I would have brought in General Zod somehow. But I would have introduced Kara.
|http://raffaelemarinetti.deviantart.com/art/Supergirl-256206552 by RaffaeleMarinetti|