On October 28th, 2014, /u/kunaal29 said the following on /r/DCcomics, in response to questions about the Teen Titans history in the New 52:
I think tha Dick used to be on an earlier incarceration of the Teen Titans. In a Red Hood and the Outlaws issue (I forgot which one), Jason and Dick talk about how Dick was romantically involved with Starfire and imply that they were on a team together. at least that how I read it.
[Edit: The information in this post is now no longer (completely) accurate! Make sure you check the update at the bottom!]