From Issue 3 (January 1977) comes this piece of news:
NEXT FROM MGM: TIMESCAPE
Saul David— who brought us Logan's Run— is hard at work on a new film, Timescape, which is being scripted by David and Simon Wincelberg— to be filmed here and in England (if early plans pan out) in 1977. The story is "a contemporary adventure drama dealing with the dimensions of time as it relates to events of the past and future." Saul David said the movie will contain some of the elements of Logan's Run but will be "farther out, intellectually."
"Saul [David] and I were working on an MGM project that never got made, Timescape. He asked me to write for Logan's Run, so I came up with a story."
It’s a shame nothing ever came of this because Shimon was a fairly prolific TV writer, and wrote for quite a few sci-fi series including Lost in Space, the original Star Trek, Voyage to the Bottom of the Sea and the Logan’s Run TV series.