Miss Martian
Miss Martian has been a fan favorite on Supergirl and Sharon Leal is more than deserving of her own show. The list of her skills from super strength to regeneration, flight, and shape shifting, is just awesome. M’gann M’orzz is a white Martian, and she is presently back on Mars in the Arrowverse. Giving her a standalone show would be the perfect reason to bring her back.