Don't think there are enough idiots to buy that DLC. It won't be profitable for them.
Unless they'll go with, "play as Clem and find out what happened between S2 and ANF!"
The thing is, the way they ended Kenny/Jane/Wellington storylines in ANF Episode 1, there'd be no point to do that. What kind of impact would it have on the overall story of the series? Clem's a bitch in ANF regardless of what you did.