The Firearm Blog caught the press release about this pistol from Walther. It is a subcompact pistol in 9mm. It looks to be a single stack. Maybe 7-8 rounds capacity.
Pictures are in the link
http://www.thefirearmblog.com/blog/2015/12/18/walther-announces-new-pps-m2-9mm-subcompact-pistol/
From: The Firearm Blog