 "The Hollywood Reporter" said Nolan would earn a salary of against 20% of the total gross.To research for the film, Nolan visited NASA and the private space program at SpaceX.Warner Bros. sought a stake in Nolan's production of "Interstellar" from Paramount, despite their traditional rivalry, and agreed to give Paramount its rights to co-finance the next film in the "Friday the 13th" horror franchise, with a stake in a future film based on the TV series "South Park".