Tell ya, two films from classic SF novels have been hang fire for several years now. One is Heinlein's The Moon is a Harsh Mistress, supposedly it was started, but I can't find any factual evidence that is true. The same is true of Hadelman's The Forever War it also seems in production hell. Rumored for a long time now is Heinlein's Have Space Suit Will Travel, this could be a really good one.... and a remake of Star Ship Troopers , done right this time!
God only knows what has happened to Besters The Stars My Destination , for the last 60 years!!!, there have been at least 7 screenplay , Bester wrote one himself... George R R Martin is a big fan of Bester , have wondered if he could get it done.