Sony Pictures and director Paul Feig have found their foursome to reboot the Ghostbusters franchise. Melissa McCarthy and Kristen Wiig are rejoining their Bridesmaids helmer Feig on the pic, with Saturday Night Live castmembers Kate McKinnon and Leslie Jones also coming aboard. We’re hearing the studio is still in negotiations but Feig apparently is confident enough about locking his cast that will fill the iconic roles played by Bill Murray, Dan Ackroyd, Harold Ramis and…