Jesus Christ, by all that is good and decent, no! He neither has the inclination, nor the obsession. He doesn't return to his earlier style, which people expected him to do for years (not anymore I hope), so he sure as hell wouldn't throw himself in the middle of Tolkien mythology and Wagner music for three years straight. And most certainly not in the way Shore has. Williams' connection with Wagner has only strengthened since Star Wars, as far as the use of the leitmotif goes. The thematic connections are only getting more complex as JW gets older, so I'm not sure what you mean when you say he would never "throw himself in the middle of Wagner music."