Diamond D is at the very least one of the ten best producers in the game, having been active since 1988 and still pumping out HEAT (though there's of course been some real clunkers in such a long career). His "Huge Hefner Chronicles" had some bangers but left a lot to be desired, but over the last couple of years since he has regained that spot as one of the illest and most trustworthy beatmakers with brilliant work for Pharoahe Monch, J-Live, himself ("Deflate Cha"), Freestyle Professors, and Collective Efforts. Therefore news of his next album, "The Diam Piece" seems extremely promising, as the DITC veteran will handle all the production while the tracklist is chock full of extremely talented guests. The tracklist leaked quite a while ago (see the link above), but there's a good chance that there's still room for changes, as we've since heard several dope snippets that's not included there ("Love" for example).
Diamond just dropped two more banging snippets via his Soundcloud Page; one solo joint called "Magnifying Glass" and one featuring a very welcome guest spot from none other than the always impressive Grand Daddy I.U. ripping Diam's well-executed soul excursion.