Report From Feb. 4th
The most recent update from Gamesradar stated that there are currently no real confirmations about the release date of the third Dune movie. While we may have confirmation that the movie WILL exist, I would wager to guess we have at least two years before returning to the Dune Cinematic Universe.
“Despite some reports to the contrary, there is actually no Dune 3 release date just yet. Denis Villeneuve initially said that he was planning to wait a few years before returning to Arrakis, but late backtracked on this.”
https://www.gamesradar.com/entertainment/sci-fi-movies/dune-3-release-date-cast-trailer-plot