It looks like the EU updated site includes preordered purchases in their FAQ. It shouldn't be hard for the NA Fanfest to do the same thing especially given the demand for tickets this year and the fact they are debuting the second lore book at the event. I don't think those tickets they gave out in 2016 for coming back at a later time will work well this time unless everyone gets a ticket for a timeslot in their goodie bag or something.