I wonder if his name will still be a killing word, which was something from the first movie and not actually from the book if I'm remembering correctly. For some reason that quote had stuck with me.
Lynch left out something called the "Ma'dhi" (not sure on spelling), which is a fremen word for an anticipated prophet. There's an implied parallel between the sound of "Muad'dib" and "Ma'dhi" despite the fact that Muad'dib is just the name of a little desert mouse species. In each work so far the mouse is figured somehow... obviously the book has all three, the Lynch version leaves out the Ma'dhi but makes reference to Muad'dib via a string of shadowed craters on a moon of Arrakis, probably since neither CGI nor puppetry was sufficient to the task of bringing such a creature to life on screen in 1984, the SyFy version had Ma'dhi, the mouse and Muad'dib, and the 2021 version has Ma'dhi and the mouse but no reference to Paul as Muad'dib yet.
I think the intent behind "my name is a killing word" was to tie the apparent power of Muad'dib to the power of a Ma'dhi. The sound weapons were invented out of whole cloth by Lynch, but are intended to represent the combination of the fremen discipline with the Wierding Way under leadership of a fanatic.
Something I'm frustrated that was not included yet in any telling of Dune on screen, is the cyclic nature of warfare technology. In the constant struggle for the high ground they end up playing rock paper scissors through the ages. Lasers were popular until body shields came along. The act of a laser hitting a body shield is catastrophic to an entire battlefield and the resulting effect is like a nuclear explosion, so lasers fell out of favor for melee weapons that could penetrate the shields. Projectile small arms could have limited effect on body shields, as well as artillery, but couldn't be wielded by parties protected by shields. Which makes lasers appealing to use against artillery units, since they're unlikely to be shielded and even if they are shielded the explosion will result in taking out the entire artillery company and surrounding area, which generally doesn't have friendlies intermixed anyways.
At the point in the story where the Baron launches his sneak attack on the Duke, the Baron opts to introduce artillery to the battlefield again (in the book).
In the 2021 movie, we see the fremen using lasers on Harkonnen spice harvesters in the opening of the movie. Because the desert makes shields useless.
