I would love to see Andy St. John again-not as an antagonist, but as a broken man who has no idea why he's even still alive. There are several reasons why this idea appeals to me.
First, TellTale loves to subvert the player's expectations, and pretty much everyone acts as though both brothers were definitely devoured by the zombies if you didn't kill them, even though you never actually SEE this. Is it likely, yes, but not definite.
Second, it's be a great way to show the players that their decisions from the first season really did matter, perhaps in ways they didn't expect. Will people who left them alive to be cruel or even out of a desire to shield Clem suddenly regret it, realizing their actions may have put her in a great amount of danger, which Lee is not around to protect her from?
Third, it's an encounter I'd actually care about. There aren't many Season One characters who even have a possibility of being alive, and while I wouldn't mind seeing them, I'm not all that excited about Clem seeing them again. As someone who worries about Clem having good decisions to make, given her young age and limited physical strength, I see this as a potentially awesome scenario.
Imagine it. Clementine has been alone and sad. She's capable, but still just a child. She's afraid of going to sleep, wanders aimlessly, and struggles to get supplies and stay alive. Then Tavia comes along, and while slightly wary, she is happy at the idea of safety and companionship. Then they arrive, and she comes across Andy. Memories of the last time she and her group thought they'd found a safe place come rushing back, along with the graphic deaths of Mark and Larry, eating or nearly eating human meat, being grabbed by her hair and held at gunpoint, and Andy fighting with and nearly killing Lee. The others notice her reaction and ask if she knows him, but she only says that he looks sad, prompting them to point out how he lost his home and family, which at the very least, she can understand.
So, what does she do? There are three options:
-Tell everyone who and what Andy is. What would be the result of this? Would they believe her? Would her outing him make him angry enough to target her? Would he be kicked out or even executed?
What does she do? Tell the others who and what he is? Maybe even a moment where she has to choose his fate. Does she get revenge? Mercy kill him? Try and help him recover? She's not Lee. If she chooses to trust him and makes a wrong call, she can't hope to fight him off.
-Keep quiet. Could he have changed? What if everyone thinks she is lying? What if not saying anything gets someone hurt or makes it easier for him to target her, should he want revenge. What if the others eventually find out? How will they react to the fact that she knew and said nothing, endangering their community and friends and loved ones? Would they maybe kick her out?
-Try to kill him. Whether she succeeds or not, or is justified or not, how would the others react to a little girl pulling a gun on someone in their safety group? Would this get her kicked out?
In the end, it all comes down to how Clem feels. Does she pity him? Fear him? Does she want revenge, or can she forgive and maybe even help him? It'd be an interesting contrast to her relationship with Lee. Plus, if she chooses to trust him and is wrong, she's not going to be able to fight her way out of it.