Bleeding Cool reports that the character in question is “Bunker”, Mexican born Miguel Jose Barragan.
Here’s an excerpt from a conversation via twitter between Gail Simone and Brett Booth:
Gail Simone: Tomorrow I am on a panel not listed on the schedule, WHERE ARE THE GAY SUPERHEROES, at 11:00 am, in Mezzanine 1. It’ll be great!
Brett Booth: We got at least one in Teen Titans:)
Gail Simone: Really? Who is the gay superhero in TT? Can you say?
Brett Booth: Bunker is gay (the purple guy, I know, not my first color choice!)
Brett Booth: We’re trying to make being gay a part of who he is, your gaydar should be pinged right off the bat:)
Gail Simone: Thanks, Brett! I don’t know the character, but I would love to hear about him so I can tell people to look out for him!
Brett Booth: First appearance other than the cover to 1.