4) Supergirl
Supergirl the character may be the Girl of Steel, but Supergirl the show very nearly bit the dust after just one season on CBS. Thankfully for its devoted fans, cooler heads prevailed, and the series found itself on The CW for season 2.
Buoyed by the charm of star Melissa Benoist, the show manages to overcome its cheesier elements to emerge as a family-friendly addition to The CW’s Arrowverse shows, bringing the mythos of Krypton and the cosmic realm into the world of Green Arrow and The Flash.
Furthermore, the addition of Tyler Hoechlin’s Superman as a recurring presence on the series has already bore fruit. Earlier this season, Supergirl and her famous cousin faced down popular DC super-villain Metallo, and the nefarious Luthor family may pose a more formidable threat than any trouble-making alien Kara has faced to date.