4) Miss Martian
The greatest surprise of Supergirl’s first season was the reveal that DEO boss Hank Henshaw was in fact the Martian Manhunter – a long-time member of the Justice League in the comics. As it seems he will be unfairly ignored in the movies, it was fantastic to see him in action here.
J’onn J’onzz’ backstory is that he is the last of his kind. However, in other versions he does have a niece, M’gann M’orzz – otherwise known as Miss Martian. Hopefully, she’s a character season two will introduce into Supergirl’s world.
Introducing M’Gann would not only give Kara another female superhero as an ally, but would also continue J’onn’s story – some of his grief over being the last Martian could be alleviated by the presence of another of his race.
Come on, give the big green guy a break.