Frequent Villeneuve collaborator Peter Konig's take on sandworms.
There are also discussions going about making one film or splitting the story across two movies. David Lynch's 1984 adaptation of the book struggled to contain the whole story in two hours, with vast amounts of material from the book cut and more material filmed but edited out.
Villeneuve admits to being fascinated by Alejandro Jodorowsky's unfilmed version of Dune, but will not be taking any inspiration from that version or any of the filmed versions of the movie. This will be a completely new take on the source material.
The new film version is being financed by Legendary Entertainment. I wouldn't expect it before late 2020 at the earliest.