Franchise creator Robert Kirkman and Telltale president Kevin Brunerthe continuation at San Diego Comic Con this week.
That's pretty much all we know at the moment. With the current series yet to finish it's not surprising that Telltale don't want to give too much away. We don't know, for example, if current protagonist and series regular Clementine will make it back for season three - we'll have to wait until the fifth and final episode of the current run to see if she makes it out alive, and if she brings all her limbs along with her.
You can read our review of the penultimate episode, Amid the Ruins, . Episode 5 is due out sometime in the next few months.