There are rumors - unsubstantiated, but at least above the usual muck - that Villeneuve may very well be returning to direct the third
movie - now rumored to be called
Sicario: Capos (Bosses) - with the whole gang coming back as well, including Emily Blunt, as previously mentioned.
This would be the movie Villeneuve has chosen to make between
Dune: Part Two and
Dune Messiah (one of the "four" scripts he recently mentioned that he's currently developing).
Now, again, this could all turn out to be BS, but at this early stage there do seem to at least be some kernels of credibility here. We shall see...