They brought back Lilly in the new trailer for Season 4 Episode 2 and in the trailer you can also see a new character sitting at the same campfire as Lilly his name has been confirmed to be James. He appears to be in his late teens to early twentys so it could be him plus it kinda looks like him. Plus Lilly's new character model looks nothing like her. Mabey the're bringing back a couple of characters and it will be nice to see the mini series tie into the main series.
he could be erasing his past and doesnt want people to know what happens to him in the past who knows? its been years Season 4 takes place after the michonne series. i guess we will find out on the next episode