Why not? Writing a gay male character in the (batman/superman/wonderwoman/flash) family would be a serious win. Writers and editors won't have to worry about popularity of the new character because the he will be tagged with the name of (batman/superman/wonderwoman/flash) and instantly get coverage. Fans who hate "change for the sake of change" will be satisfied to see that an original character would be made and an existing character's history will be spared from the writer's eraser. Proponents of gay-characters (like myself) will be beyond happy to get an original character whose sexuality is major part of his back-story and character development (as it is in real life) rather than the "as a matter fact I'm gay and its no biggie" approach.
Just think about the story ideas:
A new gay robin (an unstable youth kick out by his parents for being gay fell into a life of crime and is now being rehabilitated and turned into a crime stopping force, perhaps undoing the wrong cause by his descent as he ascends to higher plane of morality)
a new gay kid flash (while on a typical day of running from his daily tormentors, a freak accident occurs and sends him into the speedforce and turning him into the new kid flash, he then uses his powers to get revenge till he see's something deeper in life and tryings to become a hero)
wonder boy (idolizing wonder woman, his queen B and diva and would do anything to be apart of his life, finds himself being blessed with the powers of the gods, what do you think he does, dons the red blight and blue and parades around fighting whatever bad guys he finds in the name of wonder woman)
a new gay superboy (whether by clone or a super villain who goes back in time and steals a kryptonion boy from krypton to raise him to be super killing device, the boy escapes and finds himself in a new strange world and tries to find out who he is, what he wants, and what does life have in store for him)
What do you guys think?