When is the costume contest at FAN EXPO Boston? FAN EXPO HQ March 08, 2018 16:33 Follow Details coming soon! Related articles Where can I find a list of exhibitors for FAN EXPO Boston? How do I get a guest’s autograph? FAN EXPO Boston Single Day Pass Guide When will you be releasing information about Specially Ticketed Events? Who is the organizer of FAN EXPO Boston? Comments 0 comments Article is closed for comments.