<p>The cast of Denis Villeneuve&#8217;s &#8220;Dune 3&#8221; is getting the word out early: There will be major &#8220;departures&#8221; form Frank Herbert&#8217;s literary franchise in the upcoming film, which is set to pull heavily from Herbert&#8217;s 1969 sequel novel &#8220;Dune Messiah.&#8221; &#</p>