The stars and the producers and writers all talk about the show. But it is Melissa Benoist's words that make me once again realize that the show understands the character perfectly.
Early on, she says that Supergirl 'so badly wants to spread good' because she has lost so much. And that just sounds like Kara. She wants to be a hero and do what's right almost desperately. The fact that this is because she doesn't want other to suffer like she has is completely noble.
It is the exact opposite of what the Loeb Supergirl and the initial New 52 Supergirl felt. Those Supergirls were angry and bitter because of what life dealt her. She didn't want to help. She wanted to be left alone, to wallow in her anger, to rage against Earth. And that just isn't Supergirl.
So I am amazed that these Hollywood folks get the essence. I mean later in this preview, Benoist says that Supergirl is a 'beacon of hope', someone hungry to do good. That is Supergirl.
And that makes me that much more excited to see this show!