Now that it is officially announced there are videoes coming out. You can check the interview from American Rifleman
http://www.americanrifleman.org/videos/exclusive-look-at-the-hk-vp9-striker-fired-pistol
and H&K made a nice ad video with HK shooting team's John Rassmussen
Rassmussen also contributed to a thread in AR15.com
From: American Rifleman, H&K, AR15.com