That update has finally been announced by Verizon. It will be sent out in two parts, and by the time everything is all done and accounted for, the handset will feature Android 4.2.2 and Sense 5. That means BlinkFeed will be on your DROID DNA, giving you visual updates from your social networks and news feeds. In addition, Sense 5 will bring an updated dialer, calendar, gallery and contacts list to the phone. You will also get Quick Settings for fast settings changes. And there is also the usual bug fixes and enhancements.
Step one of the update requires you to download and install software version 2.08.605.1 and then doing the same thing with version 3.06.605.4. The update will be coming OTA to DROID DNA owners soon.
source: Verizon via Phandroid
UPDATE: Seems like some of our loyal readers are already receiving the update today. If it doesn't come to your HTC DROID DNA today, be patient. These things are sent out on a staggered basis so just relax. Your update will eventually arrive.