We were indeed teased, but no promises beyond the Vs. movie were made. I’ve noticed that Greg Cipes and Tara Strong have pretty much stopped talking about a sixth season. For a while Cipes talked about it as if it was a done deal. I saw Khary at a convention a few years ago and he was very blunt about the 2003 Titans being gone for good.
As much as it pains me to say it, I think there will never be a sixth season and the Vs. movie will be the last time for the 2003 Titans.