There are many classic sci-fi franchises out there this day and age, many films and TV shows which, over the years, have generated fan bases whose numbers might seem rather insane. In 1984, director Ivan Reitman’s Ghostbusters took the world by storm and since then, legions of fans have flocked to Comic Cons, parades and charity events. The number of fans keeps growing and with the film turning 30-years-old last year and an upcoming reboot currently in production, the franchise seems to be stronger than ever. A new documentary, courtesy of filmmaker Brendan Mertens, is also being released next year and it promises to highlight the fandom that Ghostbusters has unleashed. Ghostheads is due out next year and with the participation of fans across the planet, it is looking to be quite a film event.