Remarkably this has never been done before, despite the 15 trillion billion versions of the anime out there, including all of the ones with no discernible difference from those which went before. Except maybe a tweak in the colouring of the cover or something daft.
The live action Death Note movies got the Blu-Ray treatment, but not the anime.
Reps from Viz Media made the announcement during their Anime Expo 2015 panel, on July 2nd at the Los Angeles Convention Center. However, they didn't tag a release date onto the end of that.
Watch this space. As soon as I know, so will you.