Nickelodeon/20th Century Fox Joint Venture movies

In 1993, Nickelodeon signed a 2-year contract with 20th Century Fox to make feature films. The joint venture would mostly produce new material, though a Nickelodeon executive did not rule out the possibility of making films based on the Nicktoons: Doug, Rugrats and The Ren & Stimpy Show. But none of the movies were produced.

Why The Movies Were Cancelled

 * 1) Viacom, Nickelodeon's parent company acquired Paramount Pictures in 1994 and they would distribute the movies instead
 * 2) Nickelodeon/20th Century Fox joint venture contract expired in 1995
 * 3) Doug was sold to Disney in 1995, due to the show's production studio, Jumbo Pictures' sale to Disney and the show being moved to ABC in 1996
 * 4) The creatives differences with the creator of Ren & Stimpy, John Kricfalusi (John K.) and an inability to market that property in a family-friendly manner instead of a "cynical and gross humor" scuttled that film

Results

 * Nickelodeon launched its movie arm, Nickelodeon Movies in 1995
 * The Nickelodeon's Doug movie was permanently cancelled, instead Disney released its own Doug movie called Doug's 1st Movie in 1999
 * Nickelodeon released The Rugrats Movie in 1998 and spawned two sequels, Rugrats in Paris: The Movie in 2000 and Rugrats Go Wild in 2003, the last one, was a box-office failure in theaters. A live-action/hybrid CGI movie was going to be released in 2021, but it was cancelled.
 * The Ren & Stimpy movie was permanently cancelled
 * In 2003, Spike TV (Paramount Network) and John K. tried to revive the episode Life Sucks as a TV Movie/prequel of the episode Ren Seeks Help of Ren & Stimpy "Adult Party Cartoon", but at the time, Adult Party Cartoon was negatively received by the Ren & Stimpy fans, and later, Spike TV cancelled the show, only was made 8 minutes of the draft and the voice acting was complete
 * In 2016, rumors at the internet, spoke that Ren & Stimpy was getting a revival, will air before the SpongeBob 20th Anniversary Show on May 1, 2019