Disturbed seems to be switching back and forth between teasing heavier material and acoustic material in their studio updates. The last studio update we got was much heavier than the previous one, which leads us to believe they're working on the long-talked-about acoustic EP alongside their brand new album.
You can hear some of the lighter material above. Until next time when things presumably get heavier again, unless the next update is an actual album announcement. The band is currently working with producer Kevin Churko (Five Finger Death Punch, Papa Roach).