Dune and Monsterverse franchises remain with Warner Bros in spite of Legendary's new deal with Sony. Mary Parent of Legendary said so in an interview with The Wrap recently: https://www.thewrap.com/dune-2-legendary-mary-parent-interview/#:~:text=Mary Parent%2C producer of the,reality of making a blockbuster
"Everything we’ve done with Warners will continue to be done with Warners. If we’re fortunate enough to go forward, those films will go forward with Warners. So no impact."