Not Comics: GEM Pushes Back Opening Geppi's Entertainment Museum at Camden Yards, the comic book and pop culture museum owned by Diamond Comic Distributors head honcho Steve Geppi, has pushed back its July 4 launch to open in conjunction with the Baltimore Comic-Con. The museum had been set to open this week. This means Geppi's project will miss out on any expected summer visitors, but will likely receive a boost from the surge of interest and potential hardcore attendees the convention should provide. The article's most interesting section unpacks brutal early attendance figures at museums sharing GEM's space. The new opening date is September 8, which means the museum's launch will kick off the convention weekend.