well looks like my theory is out, was good while it lasted, time to start looking again.
But as john said when I asked him if Charles is new to HHN or has it been seen before, "everything old is new again" and I think that's a good clue for Chucky since it's had now a four year break from the event so it has history at the event but not maze history, as his funhouse was only a house of horrors overlay, thus a way of taking something old and making it new