According to IGN, one of Telltale Games' writers' Gary Whitta said fans of The Walking Dead's episodic game series "won't have to wait for season two to play more Walking Dead.
Specifically, Whitta said "I can tell you what you already know, which is season two is coming. There’s not much to say because it really is very early…it’s a way off. But, knowing that it’s a way off, and knowing that people are hungry for more walking Dead…there may very well be more Walking Dead from Telltale before season two," said Whitta.
"We may have a little something extra for you between season one and two.” Specifically, “something” is in the works “that will make the wait for season two slightly less agonizing.”
IGN has asked more clarification, but I think it's a safe bet that fans will be seeing some Walking Dead 1.5 before long since Telltale knows that anything they put out will be quickly consumed by their large fanbase. The Walking Dead games took the world by surprise in 2012 with their immersive story telling that pulled even those who are not fans of the show deep into the games, and the next “season” is highly anticipated as a result.