There have clearly been plans to bring the Ghostbusters brand back as a major franchise, and it seem Dan Aykroyd already has a host of ideas for follow ups to the new film, including a prequel series that would take the characters Venkman, Stantz, and Spengler, back to high school.
Fans of the Ghostbusters movies are certainly looking forward to the upcoming sequel that will return the franchise to the world of the first two films, being directed by the son of Ivan Reitman.