There is a Star Wars style guide from 1994 that warned George Lucas not to make the series' prequels. Lucasfilm creative executive, Pablo Hidalgo has released tidbits from the Star Wars style guide, created in 1994 for writers interested in working on one of West End Games' role-playing titles. It extends to characters, time periods and stories, which instructs could or couldn't be used. Hidalgo's posts also show strict guidelines regarding breaking new ground and originality in the series.