In an interview in Starlog 148 (published November 1989), MacNicol revealed that in the original script for
घोस्टबस्टर्स II (1989), the character of Janosz Poha was a rather lackluster villain called Jason. It was MacNicol who suggested to
Ivan Reitman and
Harold Ramis to make the art restorer come from Carpathia, linking him to the painting of Vigo. During filming, MacNicol spent a lot of time in his trailer, creating Janosz' origin and accent, as well as a mythology for Carpathia. He even came up with his own vision for a Carpathian flag, which featured a snake stepping on a man.