The second trailer is the only one they should have released. Decent.
First one was terrible. Bad timing and forced comedy. The major problem I had with the first one is the fact that they make it a big of a deal that she is a girl. Why should it matter. This always irks me with these kind of superhero shows. Get over it, she is a girl and can do shit like other heroes. And this "american dream" thing they are doing, please, America let it stop.
I will watch a few episodes of this before deciding. From what I can see so far I have major doubts. Just please make this about the hero/daily struggle part, and not force "girly" things into the show just because she is a female hero. Make it natural if that is really needed. You don't see other hero shows doing the same for male heroes.