It's probably not Lilly or Glenn.The whole Walking Dead series connects together:In the game,no matter what you do,Lilly runs off on her own.After that,she joins a tent community and then gets kicked out with Josh,Bob,Megan and Scott in the novel.Then,she kills Lori and The Governer in the comic series and gets ambushed by zombies.There is a little chance she is there.Glenn...I don't think so,after leaving us in the game,he joins Dale's group in both comic book series and the TV series.After that he meets Rick and he dies in the comic series,getting hit in the head with a bat.I'm guessing it's new characters.