I was thinking that maybe they will not mention Judith again and leave it up to you to decide what happened to her . And in a year or so they will write her back in as teenager or adult.
In the comic book, Lori and Judith died the night of the prison attack. So I have no idea what they're going with that storyline. Maybe she's on the bus. Or maybe the governor's girlfriend took her to replace the child that she just lost.