The last I heard was that Ringworld was likely to be made into a miniseries (probably a good idea) by the SyFy Channel (probably a horrible idea). They’ll probably opt for cut-rate CGI and dumb down the plot.
I can’t imagine Ringworld being done as anything less than epic series of multiple movies.
It’s just too grand, too overwhelming, too much to be shrunk down. Unless I produced it, I can’t imagine it meeting the expectations of my imagination.
I never watched Dune for that reason. Never even read the reviews.