Revealed on "Ghostbusters"-director Paul Feig's Twitter was an image of the 4 Lady Ghotbusters (Leslie Jones, Melissa McCarthy, Kate McKinnon and Kristen Wiig) in full uniform with their proton packs, standing in front of ECTO-1 (a funeral hearse instead of an ambulance in this reboot, fhanks) ... And what's this about an "ECTO-2"?
"In Ghostbusters, Kristen Wiig and Melissa McCarthy are authors who've penned a book about real life ghosts. The book goes nowhere, and years later Kristen Wiig gets a job at Columbia University. Before long, her book resurfaces and she is laughed off campus. Kristen Wiig is forced to reunite with her former co-writer and two other spirt wranglers when ghosts invade Manhattan, and it's up to this team to save the world." (MovieWeb)