Yes, absolutely there is ample evidence of a Warhammer 40k/Dune connection. Even a cursory look will reveal a number of similarities between Warhammer 40k and Dune that it's impossible to overlook them.
The Warhammer 40k/Dune Caveat
Warhammer 40k was inspired by a TON of different IPs--everything from Alien to Predator to Starship Troopers to the history…
Every now and again people (usually on Reddit) will begin a discussion of which fictional world is the most powerful, the most overpowered, the most destructive. And the fact of the matter is that Warhammer always wins. Warhammer 40k is the most overpowered fictional universe bar none*.
(Notice that little asterisk there? We'll…