The lore seems to indicate that Andy was taken by the fog too. Do you think they were trying to leave the door open for a possible inclusion of Andy (grownup) with mentioning this?
I think it's more likely to be child Andy but I wouldn't say no to Nica personally.
Maybe. They leave a lot of doors open for many opportunities. We still have some Pariahs who are still unknown and even Killers have been hinted at (I remember early in the Tomes of a female Killer mentioned who used to feed her victims to her pigs).
This is one thing I enjoy about the original chapters; the many open ends for future, potential characters. Heck, on the new map some of those cinema posters may be hints in themselves!