Thespian said:
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Batman though. Making Batman gay? What would that actually change, that people would have a problem against? So Bats and Vicki Vale never happened? Tali Al Ghul never got it on with him?
Uh, big whoop. While significantly large story arcs, they aren't exactly synonymous with Batman. I mean, you can't picture Supes without Lois. But does Batman have a definitive love interest? Not really. I mean, it would make a lot of sense if Batman's past and post-reboot flings with Cat-Woman were one-sided affairs. There never was any real chemistry there anyway, just poorly disguised porn.
Actually in Grant Morrison's Heart of Hush storyline Bruce admitted that he was very much in love with Catwoman and always had been. They have also shown more of this in later issues where he has has risked his reputation, his company and more when he has been in relationships with her.
And while his relationship with Talia hasn't been the synonymous with the Batman mythos his current Robin is the result of him sleeping with Talia so it makes little sense for it to suddenly be retconned away.
The Thespian said:
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How significant are the romance stories for Green Arrow, or Martian Manhunter, or Zatanna, or Wally West, Ted Kord, Guy Gardner, Booster Gold(I could totally see him as gay), or Captain Marvel?
Green Arrow's on and off relationship with Black Canary is a defining part of both characters
Zatanna's backstory involves her failed relationship with John Constantine who they just brought back into the DCU
Martian Manhunter's entire angst comes from him losing his wife and child in the battles that killed the martians
Guy Gardner's most recent character arc involved him finally acting like a grown up and realizing his feeling for Ice (granted they backed off that since the reboot a bit)
Booster Gold is a notorious ladies man both in the suit and out of it
Ted Kord had a cyber love affair with Barbra Gordon that left him both sorry they never truly got together when he died but also devastated Barbara to no small ends.
Wally West's love for Donna Troy brought her back from the dead once (granted that story and the New Teen Titans and The Titans stories never happened so he's a good choice too for the gay character.)
And the reboot is rewriting Captain Marvel... er I'm sorry Shazam, as an asshole teenager who possess the powers of magic so I doubt they care to make him gay really. But really he's thirteen so dealing with him being gay would be interesting and your right, romance has never really been a focus on his characters.
Sure, I totally agree that making Superman gay would be a bad move, but no one said it's going to be superman, so your point lacks applicability since not everyone is Superman.
In fact, DC said that it was a character not yet introduced in the New 52.
I agree with pretty much everything else you said though and I don't mean to sound heated if I come off that way.