Becca mentioned this in one of my comments, as well as MC reporting about it months ago. It was about Lucas and the rejected Frank Darabont IJ4 script. Little is known about the script other than many people seemed to be pleased with it, including Spielberg. I decided to look into it a little bit and added some links for reading for those that would like to know more about this.
Darabont might just be a bitter guy, and he's just venting, or he's completely right. Lucas has time and time again proved that he's forgotten how to write and produce good fiction.