http://www.hollywoodreporter.com/heat-vision/christopher-nolans-interstellar-warner-bros-562879
Warners, which released Nolan’s megagrossing Batman movies and maintains an overall deal with his Syncopy label, wanted in on Interstellar so badly it gave Paramount its rights to co-finance the next Friday the 13th horror film as well as its portion of a future South Park movie. Also part of the deal was an agreement to let Paramount co-finance a to-be-determined A-list Warners property.