The girl who catches the train is Crimson Fox. In the comics Crimson Fox is a Justice League Europe superhero from France who can probably avoid a falling train but stands very little chance of catching one without getting smooshed.
“Powerless” comes to us from “Cars 2” screenwriter Ben Queen, who created 2014’s unwatchable “A To Z” sitcom, which lasted 13 episodes on NBC. Judging from the new trailer I think NBC’s “Powerless” will be lucky to last that long, no matter how many times it mentions Wonder Woman and Green Lantern.