The Flintstones last appeared on TV in 2001’s The Flintstones: On the Rocks . In 2011, it was reported that Seth MacFarlane wrote an animated Flintstones TV pilot for Fox, which they rejected. Gilmore Girls ’ Dan Palladino and Family Guy ’s Kara Vallow were supposed to produce the show. Earlier this month, MacFarlane finally said that he was giving up on the project. In 2014, Warner Bros. revived the idea of a theatrical animated Flintstones movie , the first since the box office failure of 2000’s The Flintstones in Viva Rock Vegas . Chris Henchy was scheduled to write the script, with Will Ferrell and Adam McKay executive producing. Since then, the project has been quiet.