David S. Goyer, the man behind the Batman films, the Man of Steel and the upcoming Constantine TV series (might as well throw in the Justice League) apparently pitched Warner Bros. a Sandman movie based on the Neil Gaiman classic comic book series.
Bad Ass Digest has it from a source that Goyer pitched Sandman with it also said Joseph Gordon-Levitt is involved. It's unknown exactly how Gordon-Levitt is involved, but the site speculates it's for a lead role (Morpheus?).
It's further said that Geoff Johns is on board and that the Sandman discussions are in early talks, so whether this evolves to anything more remains to be seen.
David Goyer also wrote the script for Batman Vs. Superman.