Jon Favreau and Robert Downey Jr team for sci-fi Western Cowboys & Aliens Iron Man helmer Jon Favreau has signed on to direct Robert Downey Jr. in the sci-fi Western Cowboys & Aliens. Based on the Platinum Studios comic book series, Cowboys and Aliens explores what would happen if the traditional Old West enemies — cowboys and Native Americans — found the prairie attacked by aliens in mid-1800s Arizona. Long in development, the “Aliens” project originally was set up at Universal and DreamWorks in 1997 with Steve Oedekerk writing and directing. It later moved to Columbia, with “Sahara” screenwriters Joshua Oppenheimer and Thomas Donnelly writing. The most recent version being written by executive producers Alex Kurtzman and Roberto Orci, along with “Lost” executive producer Damon Lindelof.