It’s Yabba Dabba Doo time again. Warner Bros. is hoping to bring The Flintstones back to the big-screen, this time as a full-length animated feature. Chris Henchy -- who is partners with Will Ferrell and Adam McKay in Gary Sanchez Productions and who also co-wrote the script for Warners' Ferrell-Zack Galifianakis comedy The Campaign -- is penning the script. Ferrell and McKay will executive produce Flintstones, which is in development stages. Flintstones was The Simpsons of its day, a primetime cartoon and sitcom that ran from 1960 to 1966 and then entertained millions in the ensuing decades when it aired on syndication. The show was set in the Stone Age and told of the antics of Fred Flintstone, his wife Wilma, his best friend Barney Rubble and Rubble’s wife and Wilma’s best friend, Betty. From the town of Bedrock, Fred worked in a quarry, liked to barbecue brontosaurus burgers and live the modern stone age family life. The show had several short-lived reboots ov