Nightman was based on an actual comic book by Ultraverse created in the 90's
The end credits list Chrysler as supplying cars. However the black stretch limousine is a Cadillac from General Motors and the white stretch limousine is a Lincoln Town Car from Ford Motor Company. Our hero does drive a Chrysler Prowler.
Lead Matt McColm's, twin brother stuntman and former model Mark McColm, who was much larger than Matt played the actual Nightman in the costume and did most the in costume stunts for Matt.